code: def write(self, data):
          
  
          if self.is_closing():
              return
  
          self._write_buffer += data
  
          if len(self._write_buffer) >= self._output_buffer_limit_high:
              self._protocol.pause_writing()
  
          if self._write_buffer:
              self._can_write.set()
docs: Send `data` over the IBB. If `data` is larger than the block size
          is is chunked and sent in chunks.
  
          Chunks from one call of :meth:`write` will always be sent in
          series.