How to use the pulsectl.pulsectl.PulseSinkInfo function in pulsectl

def play_sample(self, name, sink=None, volume=1.0, proplist_str=None):
		'''Play specified sound sample,
				with an optional sink object/name/index, volume and proplist string parameters.
			Sample must be stored on the server in advance, see e.g. "pacmd list-samples".
			See also libcanberra for an easy XDG theme sample loading, storage and playback API.'''
		if isinstance(sink, PulseSinkInfo): sink = sink.index
		sink = str(sink) if sink is not None else None
		proplist = c.pa.proplist_from_string(proplist_str) if proplist_str else None
		volume = int(round(volume*c.PA_VOLUME_NORM))
		with self._pulse_op_cb() as cb:
			try:
				if not proplist:
					c.pa.context_play_sample(self._ctx, name, sink, volume, cb, None)
				else:
					c.pa.context_play_sample_with_proplist(
						self._ctx, name, sink, volume, proplist, cb, None )
			except c.pa.CallError as err: raise PulseOperationInvalid(err.args[-1])

c.PA_SINK_INPUT_INFO_CB_T,
		c.pa.context_get_sink_input_info_list, PulseSinkInputInfo )
	sink_input_info = _pulse_get_list(
		c.PA_SINK_INPUT_INFO_CB_T,
		c.pa.context_get_sink_input_info, PulseSinkInputInfo )
	source_output_list = _pulse_get_list(
		c.PA_SOURCE_OUTPUT_INFO_CB_T,
		c.pa.context_get_source_output_info_list, PulseSourceOutputInfo )
	source_output_info = _pulse_get_list(
		c.PA_SOURCE_OUTPUT_INFO_CB_T,
		c.pa.context_get_source_output_info, PulseSourceOutputInfo )

	sink_list = _pulse_get_list(
		c.PA_SINK_INFO_CB_T, c.pa.context_get_sink_info_list, PulseSinkInfo )
	sink_info = _pulse_get_list(
		c.PA_SINK_INFO_CB_T, c.pa.context_get_sink_info_by_index, PulseSinkInfo )
	source_list = _pulse_get_list(
		c.PA_SOURCE_INFO_CB_T, c.pa.context_get_source_info_list, PulseSourceInfo )
	source_info = _pulse_get_list(
		c.PA_SOURCE_INFO_CB_T, c.pa.context_get_source_info_by_index, PulseSourceInfo )
	card_list = _pulse_get_list(
		c.PA_CARD_INFO_CB_T, c.pa.context_get_card_info_list, PulseCardInfo )
	card_info = _pulse_get_list(
		c.PA_CARD_INFO_CB_T, c.pa.context_get_card_info_by_index, PulseCardInfo )
	client_list = _pulse_get_list(
		c.PA_CLIENT_INFO_CB_T, c.pa.context_get_client_info_list, PulseClientInfo )
	client_info = _pulse_get_list(
		c.PA_CLIENT_INFO_CB_T, c.pa.context_get_client_info, PulseClientInfo )
	server_info = _pulse_get_list(
		c.PA_SERVER_INFO_CB_T, c.pa.context_get_server_info, PulseServerInfo, singleton=True )
	module_info = _pulse_get_list(
		c.PA_MODULE_INFO_CB_T, c.pa.context_get_module_info, PulseModuleInfo )

		func=lambda sink: sink.name if isinstance(sink, PulseSinkInfo) else sink )
	source_default_set = _pulse_method_call(

pa_op = pulse_func( self._ctx,
					*([index, cb, None] if index is not None else [cb, None]) )
			c.pa.operation_unref(pa_op)
			data = data or list()
			if index is not None or singleton:
				if not data: raise PulseIndexError(index)
				data, = data
			return data
		_wrapper_method.__name__ = '...'
		_wrapper_method.__doc__ = 'Signature: func({})'.format(
			'' if pulse_func.__name__.endswith('_list') or singleton or not index_arg else 'index' )
		return _wrapper_method

	get_sink_by_name = _pulse_get_list(
		c.PA_SINK_INFO_CB_T,
		c.pa.context_get_sink_info_by_name, PulseSinkInfo )
	get_source_by_name = _pulse_get_list(
		c.PA_SOURCE_INFO_CB_T,
		c.pa.context_get_source_info_by_name, PulseSourceInfo )
	get_card_by_name = _pulse_get_list(
		c.PA_CARD_INFO_CB_T,
		c.pa.context_get_card_info_by_name, PulseCardInfo )

	sink_input_list = _pulse_get_list(
		c.PA_SINK_INPUT_INFO_CB_T,
		c.pa.context_get_sink_input_info_list, PulseSinkInputInfo )
	sink_input_info = _pulse_get_list(
		c.PA_SINK_INPUT_INFO_CB_T,
		c.pa.context_get_sink_input_info, PulseSinkInputInfo )
	source_output_list = _pulse_get_list(
		c.PA_SOURCE_OUTPUT_INFO_CB_T,
		c.pa.context_get_source_output_info_list, PulseSourceOutputInfo )

def mute(self, obj, mute=True):
		assert_pulse_object(obj)
		method = {
			PulseSinkInfo: self.sink_mute,
			PulseSinkInputInfo: self.sink_input_mute,
			PulseSourceInfo: self.source_mute,
			PulseSourceOutputInfo: self.source_output_mute }.get(type(obj))
		if not method: raise NotImplementedError(type(obj))
		method(obj.index, mute)
		obj.mute = mute