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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>GIVFuncInfo: GObject Introspection Reference Manual</title>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#gi-GIVFuncInfo.description" class="shortcut">Description</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
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</tr></table>
<div class="refentry">
<a name="gi-GIVFuncInfo"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gi-GIVFuncInfo.top_of_page"></a>GIVFuncInfo</span></h2>
<p>GIVFuncInfo — Struct representing a virtual function</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gi-GIVFuncInfo.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="gi-GIVFuncInfo.html#GIVFuncInfoFlags" title="enum GIVFuncInfoFlags"><span class="returnvalue">GIVFuncInfoFlags</span></a>
</td>
<td class="function_name">
<a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-get-flags" title="g_vfunc_info_get_flags ()">g_vfunc_info_get_flags</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#gint"><span class="returnvalue">gint</span></a>
</td>
<td class="function_name">
<a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-get-offset" title="g_vfunc_info_get_offset ()">g_vfunc_info_get_offset</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gi-GISignalInfo.html#GISignalInfo" title="GISignalInfo"><span class="returnvalue">GISignalInfo</span></a> *
</td>
<td class="function_name">
<a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-get-signal" title="g_vfunc_info_get_signal ()">g_vfunc_info_get_signal</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gi-GIFunctionInfo.html#GIFunctionInfo" title="GIFunctionInfo"><span class="returnvalue">GIFunctionInfo</span></a> *
</td>
<td class="function_name">
<a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-get-invoker" title="g_vfunc_info_get_invoker ()">g_vfunc_info_get_invoker</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="gi-GIVFuncInfo.html#g-vfunc-info-get-address" title="g_vfunc_info_get_address ()">g_vfunc_info_get_address</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#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-invoke" title="g_vfunc_info_invoke ()">g_vfunc_info_invoke</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gi-GIVFuncInfo.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="typedef_keyword">typedef</td>
<td class="function_name"><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo">GIVFuncInfo</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfoFlags" title="enum GIVFuncInfoFlags">GIVFuncInfoFlags</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gi-GIVFuncInfo.description"></a><h2>Description</h2>
<p>GIVfuncInfo represents a virtual function. A property belongs to
either a <a class="link" href="gi-GIObjectInfo.html#GIObjectInfo" title="GIObjectInfo"><span class="type">GIObjectInfo</span></a> or a <a class="link" href="gi-GIInterfaceInfo.html#GIInterfaceInfo" title="GIInterfaceInfo"><span class="type">GIInterfaceInfo</span></a>.</p>
<div class="refsect1">
<a name="gi-givfuncinfo.struct-hierarchy"></a><h2>Struct hierarchy</h2>
<pre class="synopsis">
  <a class="link" href="gi-GIBaseInfo.html" title="GIBaseInfo">GIBaseInfo</a>
   +----<a class="link" href="gi-GICallableInfo.html" title="GICallableInfo">GICallableInfo</a>
         +----<a class="link" href="gi-GIFunctionInfo.html" title="GIFunctionInfo">GIFunctionInfo</a>
         +----<a class="link" href="gi-GISignalInfo.html" title="GISignalInfo">GISignalInfo</a>
         +----GIVFuncInfo
</pre>
</div>
</div>
<div class="refsect1">
<a name="gi-GIVFuncInfo.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="g-vfunc-info-get-flags"></a><h3>g_vfunc_info_get_flags ()</h3>
<pre class="programlisting"><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfoFlags" title="enum GIVFuncInfoFlags"><span class="returnvalue">GIVFuncInfoFlags</span></a>
g_vfunc_info_get_flags (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>);</pre>
<p>Obtain the flags for this virtual function info. See <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfoFlags" title="enum GIVFuncInfoFlags"><span class="type">GIVFuncInfoFlags</span></a> for
more information about possible flag values.</p>
<div class="refsect3">
<a name="id-1.4.2.10.6.2.5"></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>info</p></td>
<td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.2.10.6.2.6"></a><h4>Returns</h4>
<p> the flags</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-vfunc-info-get-offset"></a><h3>g_vfunc_info_get_offset ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>
g_vfunc_info_get_offset (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>);</pre>
<p>Obtain the offset of the function pointer in the class struct. The value
0xFFFF indicates that the struct offset is unknown.</p>
<div class="refsect3">
<a name="id-1.4.2.10.6.3.5"></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>info</p></td>
<td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.2.10.6.3.6"></a><h4>Returns</h4>
<p> the struct offset or 0xFFFF if it's unknown</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-vfunc-info-get-signal"></a><h3>g_vfunc_info_get_signal ()</h3>
<pre class="programlisting"><a class="link" href="gi-GISignalInfo.html#GISignalInfo" title="GISignalInfo"><span class="returnvalue">GISignalInfo</span></a> *
g_vfunc_info_get_signal (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>);</pre>
<p>Obtain the signal for the virtual function if one is set.
The signal comes from the object or interface to which
this virtual function belongs.</p>
<div class="refsect3">
<a name="id-1.4.2.10.6.4.5"></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>info</p></td>
<td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.2.10.6.4.6"></a><h4>Returns</h4>
<p> the signal or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if none set. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-vfunc-info-get-invoker"></a><h3>g_vfunc_info_get_invoker ()</h3>
<pre class="programlisting"><a class="link" href="gi-GIFunctionInfo.html#GIFunctionInfo" title="GIFunctionInfo"><span class="returnvalue">GIFunctionInfo</span></a> *
g_vfunc_info_get_invoker (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>);</pre>
<p>If this virtual function has an associated invoker method, this
method will return it.  An invoker method is a C entry point.</p>
<p>Not all virtuals will have invokers.</p>
<div class="refsect3">
<a name="id-1.4.2.10.6.5.6"></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>info</p></td>
<td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.2.10.6.5.7"></a><h4>Returns</h4>
<p> the <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. Free it with
<a class="link" href="gi-GIBaseInfo.html#g-base-info-unref" title="g_base_info_unref ()"><code class="function">g_base_info_unref()</code></a> when done. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-vfunc-info-get-address"></a><h3>g_vfunc_info_get_address ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a>
g_vfunc_info_get_address (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>,
                          <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> implementor_gtype</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> **error</code></em>);</pre>
<p>This method will look up where inside the type struct of <em class="parameter"><code>implementor_gtype</code></em>

is the implementation for <em class="parameter"><code>info</code></em>
.</p>
<div class="refsect3">
<a name="id-1.4.2.10.6.6.5"></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>info</p></td>
<td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>implementor_gtype</p></td>
<td class="parameter_description"><p><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> implementing this virtual function</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>return location for a <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-1.4.2.10.6.6.6"></a><h4>Returns</h4>
<p> address to a function or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if an error happened</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-vfunc-info-invoke"></a><h3>g_vfunc_info_invoke ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
g_vfunc_info_invoke (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>,
                     <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> implementor</code></em>,
                     <em class="parameter"><code>const <a class="link" href="gi-common-types.html#GIArgument" title="GIArgument"><span class="type">GIArgument</span></a> *in_args</code></em>,
                     <em class="parameter"><code><span class="type">int</span> n_in_args</code></em>,
                     <em class="parameter"><code>const <a class="link" href="gi-common-types.html#GIArgument" title="GIArgument"><span class="type">GIArgument</span></a> *out_args</code></em>,
                     <em class="parameter"><code><span class="type">int</span> n_out_args</code></em>,
                     <em class="parameter"><code><a class="link" href="gi-common-types.html#GIArgument" title="GIArgument"><span class="type">GIArgument</span></a> *return_value</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> **error</code></em>);</pre>
<p>Invokes the function described in <em class="parameter"><code>info</code></em>
 with the given
arguments. Note that inout parameters must appear in both
argument lists.</p>
<p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
<div class="refsect3">
<a name="id-1.4.2.10.6.7.6"></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>info</p></td>
<td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> describing the virtual function to invoke</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>implementor</p></td>
<td class="parameter_description"><p><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> of the type that implements this virtual function</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>in_args</p></td>
<td class="parameter_description"><p>an array of <a class="link" href="gi-common-types.html#GIArgument" title="GIArgument"><span class="type">GIArgument</span></a>s, one for each in
parameter of <em class="parameter"><code>info</code></em>
. If there are no in parameter, <em class="parameter"><code>in_args</code></em>
can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n_in_args</p></td>
<td class="parameter_description"><p>the length of the <em class="parameter"><code>in_args</code></em>
array</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out_args</p></td>
<td class="parameter_description"><p>an array of <a class="link" href="gi-common-types.html#GIArgument" title="GIArgument"><span class="type">GIArgument</span></a>s, one for each out
parameter of <em class="parameter"><code>info</code></em>
. If there are no out parameters, <em class="parameter"><code>out_args</code></em>
may be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n_out_args</p></td>
<td class="parameter_description"><p>the length of the <em class="parameter"><code>out_args</code></em>
array</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>return_value</p></td>
<td class="parameter_description"><p>return location for the return value of the
function. If the function returns void, <em class="parameter"><code>return_value</code></em>
may be
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>return location for detailed error information, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.2.10.6.7.7"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the function has been invoked, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if an
error occurred.</p>
</div>
</div>
</div>
<div class="refsect1">
<a name="gi-GIVFuncInfo.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GIVFuncInfo"></a><h3>GIVFuncInfo</h3>
<pre class="programlisting">typedef GIBaseInfo GIVFuncInfo;
</pre>
<p>Represents a virtual function.</p>
</div>
<hr>
<div class="refsect2">
<a name="GIVFuncInfoFlags"></a><h3>enum GIVFuncInfoFlags</h3>
<p>Flags of a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> struct.</p>
<div class="refsect3">
<a name="id-1.4.2.10.7.3.4"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GI-VFUNC-MUST-CHAIN-UP:CAPS"></a>GI_VFUNC_MUST_CHAIN_UP</p></td>
<td class="enum_member_description">
<p>chains up to the parent type</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GI-VFUNC-MUST-OVERRIDE:CAPS"></a>GI_VFUNC_MUST_OVERRIDE</p></td>
<td class="enum_member_description">
<p>overrides</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GI-VFUNC-MUST-NOT-OVERRIDE:CAPS"></a>GI_VFUNC_MUST_NOT_OVERRIDE</p></td>
<td class="enum_member_description">
<p>does not override</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GI-VFUNC-THROWS:CAPS"></a>GI_VFUNC_THROWS</p></td>
<td class="enum_member_description">
<p>Includes a <a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a></p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
</div>
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