pub unsafe extern "C" fn gtk_source_completion_start(
completion: *mut GtkSourceCompletion,
providers: *mut GList,
context: *mut GtkSourceCompletionContext,
) -> gbooleanpub unsafe extern "C" fn gtk_source_completion_start(
completion: *mut GtkSourceCompletion,
providers: *mut GList,
context: *mut GtkSourceCompletionContext,
) -> gboolean