unsafe extern "C" fn child_proxy_get_child_by_index<T: ChildProxyImpl>(
child_proxy: *mut GstChildProxy,
index: u32,
) -> *mut GObject
unsafe extern "C" fn child_proxy_get_child_by_index<T: ChildProxyImpl>(
child_proxy: *mut GstChildProxy,
index: u32,
) -> *mut GObject