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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
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<title>GConf Reference Manual: GConfEngine</title>
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<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> 
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                  <a href="#gconf-gconf-engine.object-hierarchy" class="shortcut">Object Hierarchy</a></span>
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<a name="gconf-gconf-engine"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gconf-gconf-engine.top_of_page"></a>GConfEngine</span></h2>
<p>GConfEngine — a GConf "database"</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gconf-gconf-engine.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> *
</td>
<td class="function_name">
<a class="link" href="gconf-gconf-engine.html#gconf-engine-get-default" title="gconf_engine_get_default ()">gconf_engine_get_default</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> *
</td>
<td class="function_name">
<a class="link" href="gconf-gconf-engine.html#gconf-engine-get-for-address" title="gconf_engine_get_for_address ()">gconf_engine_get_for_address</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> *
</td>
<td class="function_name">
<a class="link" href="gconf-gconf-engine.html#gconf-engine-get-for-addresses" title="gconf_engine_get_for_addresses ()">gconf_engine_get_for_addresses</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gconf-gconf-engine.html#gconf-engine-unref" title="gconf_engine_unref ()">gconf_engine_unref</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gconf-gconf-engine.html#gconf-engine-ref" title="gconf_engine_ref ()">gconf_engine_ref</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> *
</td>
<td class="function_name">
<a class="link" href="gconf-gconf-engine.html#gconf-engine-get-local" title="gconf_engine_get_local ()">gconf_engine_get_local</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> *
</td>
<td class="function_name">
<a class="link" href="gconf-gconf-engine.html#gconf-engine-get-local-for-addresses" title="gconf_engine_get_local_for_addresses ()">gconf_engine_get_local_for_addresses</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gconf-gconf-engine.html#gconf-engine-set-user-data" title="gconf_engine_set_user_data ()">gconf_engine_set_user_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a>
</td>
<td class="function_name">
<a class="link" href="gconf-gconf-engine.html#gconf-engine-get-user-data" title="gconf_engine_get_user_data ()">gconf_engine_get_user_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gconf-gconf-engine.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine">GConfEngine</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gconf-gconf-engine.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">
</pre>
</div>
<div class="refsect1">
<a name="gconf-gconf-engine.description"></a><h2>Description</h2>
<p>
A <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> represents a connection to the GConf database. The
default <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>, returned from <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-default" title="gconf_engine_get_default ()"><code class="function">gconf_engine_get_default()</code></a>, represents the
user's normal configuration source search path. Configuration-related
utilities, such as a configuration editor tool, might wish to access a
particular configuration source directly; they can obtain a
non-default <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> with <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-for-address" title="gconf_engine_get_for_address ()"><code class="function">gconf_engine_get_for_address()</code></a>.
</p>
<p>
Once you have a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>, you can query and manipulate
configuration values.
</p>
</div>
<div class="refsect1">
<a name="gconf-gconf-engine.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gconf-engine-get-default"></a><h3>gconf_engine_get_default ()</h3>
<pre class="programlisting"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> *
gconf_engine_get_default (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns the default <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>. All clients should use this, unless 
they are special configuration-related tools. The caller of this
function assumes one reference count, and must call
<a class="link" href="gconf-gconf-engine.html#gconf-engine-unref" title="gconf_engine_unref ()"><code class="function">gconf_engine_unref()</code></a> at some point. It's fairly important to unref the
<a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>, to cleanly close the connection to</p>
<span class="application">gconfd</span>. So if possible close the connection
<p>before exiting your application.</p>
<div class="refsect3">
<a name="id-1.2.4.7.2.7"></a><h4>Returns</h4>
<p> the default <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>. </p>
<p><span class="annotation">[<a href="http://foldoc.org/transfer%20full"><span class="acronym">transfer full</span></a>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-for-address"></a><h3>gconf_engine_get_for_address ()</h3>
<pre class="programlisting"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> *
gconf_engine_get_for_address (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *address</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);</pre>
<p>
Obtains a special <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>; mostly useful for specialized
GConf-related tools. Normal clients shouldn't need to use it.
As with <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-default" title="gconf_engine_get_default ()"><code class="function">gconf_engine_get_default()</code></a>, the returned <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> should be
unreferenced by the caller of this function.
</p>
<div class="refsect3">
<a name="id-1.2.4.7.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>address</p></td>
<td class="parameter_description"><p>a configuration source address.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>err</p></td>
<td class="parameter_description"><p>the return location for an allocated <a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a>, or <span class="symbol">NULL</span> to ignore errors.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.4.7.3.6"></a><h4>Returns</h4>
<p>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-for-addresses"></a><h3>gconf_engine_get_for_addresses ()</h3>
<pre class="programlisting"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> *
gconf_engine_get_for_addresses (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="type">GSList</span></a> *addresses</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);</pre>
<p>
Similar to <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-for-address" title="gconf_engine_get_for_address ()"><code class="function">gconf_engine_get_for_address()</code></a> , but takes a list of addresses
instead of a single address.
</p>
<div class="refsect3">
<a name="id-1.2.4.7.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>addresses</p></td>
<td class="parameter_description"><p>a list of configuration addresses.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>err</p></td>
<td class="parameter_description"><p>the return location for an allocated <a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a>, or <span class="symbol">NULL</span> to ignore errors.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.4.7.4.6"></a><h4>Returns</h4>
<p>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</p>
<p></p>
</div>
<p class="since">Since 2.4</p>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-unref"></a><h3>gconf_engine_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gconf_engine_unref (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *conf</code></em>);</pre>
<p>
Decreases the reference count of a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> by one; if the
reference count reaches 0, destroys the <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.
</p>
<div class="refsect3">
<a name="id-1.2.4.7.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>conf</p></td>
<td class="parameter_description"><p>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-ref"></a><h3>gconf_engine_ref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gconf_engine_ref (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *conf</code></em>);</pre>
<p>
Increases the reference count of a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> by one.
</p>
<div class="refsect3">
<a name="id-1.2.4.7.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>conf</p></td>
<td class="parameter_description"><p>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-local"></a><h3>gconf_engine_get_local ()</h3>
<pre class="programlisting"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> *
gconf_engine_get_local (<em class="parameter"><code>const <span class="type">char</span> *address</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);</pre>
<p>
Obtain a local (non-process-transparent) <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>. Local engines
do not support notification, and can only access config databases
directly (they do not use the multiple sources in a path system
supported by nonlocal engines).
</p>
<div class="refsect3">
<a name="id-1.2.4.7.7.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>address</p></td>
<td class="parameter_description"><p>address of local database.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>err</p></td>
<td class="parameter_description"><p>return location of an allocated <a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.4.7.7.6"></a><h4>Returns</h4>
<p>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-local-for-addresses"></a><h3>gconf_engine_get_local_for_addresses ()</h3>
<pre class="programlisting"><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="returnvalue">GConfEngine</span></a> *
gconf_engine_get_local_for_addresses (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="type">GSList</span></a> *addresses</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **err</code></em>);</pre>
<p>
Obtains a local <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> similar to <a class="link" href="gconf-gconf-engine.html#gconf-engine-get-local" title="gconf_engine_get_local ()"><code class="function">gconf_engine_get_local()</code></a>.
Instead of taking the address of the local database, this function takes
the addresses of the sources and gets the <a class="link" href="gconf-gconf-sources.html#GConfSources" title="struct GConfSources"><span class="type">GConfSources</span></a> using <a class="link" href="gconf-gconf-sources.html#gconf-sources-new-from-addresses" title="gconf_sources_new_from_addresses ()"><code class="function">gconf_sources_new_from_addresses()</code></a>.
</p>
<div class="refsect3">
<a name="id-1.2.4.7.8.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>addresses</p></td>
<td class="parameter_description"><p>a list of addresses of <a class="link" href="gconf-gconf-sources.html#GConfSources" title="struct GConfSources"><span class="type">GConfSources</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>err</p></td>
<td class="parameter_description"><p>the return location for an allocated <a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a>, or <span class="symbol">NULL</span> to ignore errors.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.4.7.8.6"></a><h4>Returns</h4>
<p>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</p>
<p></p>
</div>
<p class="since">Since 2.8</p>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-set-user-data"></a><h3>gconf_engine_set_user_data ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gconf_engine_set_user_data (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *engine</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> dnotify</code></em>);</pre>
<p>
Sets the user_data and the destroy notification function fields of a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.
</p>
<div class="refsect3">
<a name="id-1.2.4.7.9.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>engine</p></td>
<td class="parameter_description"><p>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dnotify</p></td>
<td class="parameter_description"><p>a pointer to the function to be called during destroy.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gconf-engine-get-user-data"></a><h3>gconf_engine_get_user_data ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a>
gconf_engine_get_user_data (<em class="parameter"><code><a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a> *engine</code></em>);</pre>
<p>
Returns the user_data field of a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.
</p>
<div class="refsect3">
<a name="id-1.2.4.7.10.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>engine</p></td>
<td class="parameter_description"><p>a <a class="link" href="gconf-gconf-engine.html#GConfEngine" title="GConfEngine"><span class="type">GConfEngine</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.4.7.10.6"></a><h4>Returns</h4>
<p>a pointer to the user_data.</p>
<p></p>
</div>
</div>
</div>
<div class="refsect1">
<a name="gconf-gconf-engine.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GConfEngine"></a><h3>GConfEngine</h3>
<pre class="programlisting">typedef struct _GConfEngine GConfEngine;</pre>
<p>An opaque data type representing one or more configuration sources.</p>
</div>
</div>
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