unsafe extern "C" fn aggregator_pad_flush<T: AggregatorPadImpl>(
ptr: *mut GstAggregatorPad,
aggregator: *mut GstAggregator,
) -> GstFlowReturn
unsafe extern "C" fn aggregator_pad_flush<T: AggregatorPadImpl>(
ptr: *mut GstAggregatorPad,
aggregator: *mut GstAggregator,
) -> GstFlowReturn