docs: def print(self, tag=None, name=None):
          """
          Prints each tuple to stdout flushing after each tuple.
  
          If `tag` is not `None` then each tuple has "tag: " prepended
          to it before printing.
  
          Args:
              tag: A tag to prepend to each tuple.
              name(str): Name of the resulting stream.
                  When `None` defaults to a generated name.
          Returns:
              streamsx.topology.topology.Sink: Stream termination.
  
          .. versionadded:: 1.6.1 `tag`, `name` parameters.
  
          .. versionchanged:: 1.7
              Now returns a :py:class:`Sink` instance.
          """
          _name = name
          if _name is None:
              _name = 'print'
          fn = streamsx.topology.functions.print_flush
          if tag is not None:
              tag = str(tag) + ': '
              fn = lambda v : streamsx.topology.functions.print_flush(tag + str(v))
          sp = self.for_each(fn, name=_name)
          sp._op().sl = _SourceLocation(_source_info(), 'print')
          return sp