docs: def write(self, data: bytes) -> None:
          """
          Write the data.
          """
          if self.finished():
              if self._exc:
                  raise self._exc
  
              raise WriteAfterFinishedError
  
          if not data:
              return
  
          try:
              self._delegate.write_data(data, finished=False)
  
          except BaseWriteException as e:
              self._finished.set()
              if self._exc is None:
                  self._exc = e
  
              raise