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<varlistentry><term><parameter>user_data</parameter> :</term>
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<listitem><simpara>user data set when the signal handler was connected.</simpara></listitem></varlistentry>
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</variablelist><para>Since 2.4
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<indexterm role="2.4"><primary>GtkActionGroup::disconnect-proxy</primary></indexterm><programlisting><link linkend="void">void</link> user_function (<link linkend="GtkActionGroup">GtkActionGroup</link> *action_group,
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<link linkend="GtkAction">GtkAction</link> *action,
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<link linkend="GtkWidget">GtkWidget</link> *proxy,