(self)
return self._watermark
Returns the watermark passed to begin() method call, or None.

    None will be returned if the action is not in progress.
Returns the watermark passed to begin() method call, or None.
Returns the watermark passed to begin () method call or None .
def watermark(self):
    """Returns the watermark passed to begin() method call, or None.

    None will be returned if the action is not in progress.
    """
    return self._watermark
def watermark ( self ) : return self . _watermark