141 pub type BoxError = Box<dyn error::Error + Send + Sync>;  typedef
171     fn generate(&self) -> Result<Box<dyn StreamSource>, BoxError>;  in generate()  argument
186     ) -> Result<(Box<dyn StreamControl>, Box<dyn PlaybackBufferStream>), BoxError>;  in new_playback_stream()  argument
198     ) -> Result<(Box<dyn StreamControl>, Box<dyn AsyncPlaybackBufferStream>), BoxError> {  in new_async_playback_stream()  argument
212     ) -> Result<(Box<dyn StreamControl>, Box<dyn AsyncPlaybackBufferStream>), BoxError> {  in async_new_async_playback_stream()  argument
232         BoxError,  in new_capture_stream()  argument
262         BoxError,  in new_async_capture_stream()  argument
291         BoxError,  in async_new_async_capture_stream()  argument
305     fn next_playback_buffer<'b, 's: 'b>(&'s mut self) -> Result<PlaybackBuffer<'b>, BoxError>;  in next_playback_buffer()  argument
311         f: &mut dyn FnMut(&mut PlaybackBuffer<'b>) -> Result<(), BoxError>,  in write_playback_buffer()  argument
321     fn next_playback_buffer<'b, 's: 'b>(&'s mut self) -> Result<PlaybackBuffer<'b>, BoxError> {  in next_playback_buffer()  argument
333     ) -> Result<AsyncPlaybackBuffer<'a>, BoxError>;  in next_playback_buffer()  argument
341     ) -> Result<AsyncPlaybackBuffer<'a>, BoxError> {  in next_playback_buffer()  argument
354 ) -> Result<(), BoxError>  in async_write_playback_buffer()  argument
695     fn next_playback_buffer<'b, 's: 'b>(&'s mut self) -> Result<PlaybackBuffer<'b>, BoxError> {  in next_playback_buffer()  argument
719     ) -> Result<AsyncPlaybackBuffer<'a>, BoxError> {  in next_playback_buffer()  argument
768     ) -> Result<(Box<dyn StreamControl>, Box<dyn PlaybackBufferStream>), BoxError> {  in new_playback_stream()  argument
788     ) -> Result<(Box<dyn StreamControl>, Box<dyn AsyncPlaybackBufferStream>), BoxError> {  in new_async_playback_stream()  argument
812     fn generate(&self) -> Result<Box<dyn StreamSource>, BoxError> {  in generate()  argument