/usr/share/kdevcodegen/templates/class_property_signal_declaration_cpp.txt is in kdevelop-data 4:5.2.1-1ubuntu4.
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1 2 3 4 | {# Template for class property signal method declaration #}
{% load kdev_filters %}
{# standard four spaces indentation to match context #}
void {{ property.name }}Changed({{ property.type|arg_type }} {{ property.name }});
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