(self, serialized)
Merges serialized protocol buffer data into this message.

    When we find a field in |serialized| that is already present
    in this message:
      - If it's a "repeated" field, we append to the end of our list.
      - Else, if it's a scalar, we overwrite our field.
      - Else, (it's a nonrepeated composite), we recursively merge
        into the existing composite.

    TODO(robinson): Document handling of unknown fields.

    Args:
      serialized: Any object that allows us to call buffer(serialized)
        to access a string of bytes using the buffer interface.

    TODO(robinson): When we switch to a helper, this will return None.

    Returns:
      The number of bytes read from |serialized|.
      For non-group messages, this will always be len(serialized),
      but for messages which are actually groups, this will
      generally be less than len(serialized), since we must
      stop when we reach an END_GROUP tag.  Note that if
      we *do* stop because of an END_GROUP tag, the number
      of bytes returned does not include the bytes
      for the END_GROUP tag information.
Merges serialized protocol buffer data into this message.
Merges serialized protocol buffer data into this message .
def MergeFromString(self, serialized):
    """Merges serialized protocol buffer data into this message.

    When we find a field in |serialized| that is already present
    in this message:
      - If it's a "repeated" field, we append to the end of our list.
      - Else, if it's a scalar, we overwrite our field.
      - Else, (it's a nonrepeated composite), we recursively merge
        into the existing composite.

    TODO(robinson): Document handling of unknown fields.

    Args:
      serialized: Any object that allows us to call buffer(serialized)
        to access a string of bytes using the buffer interface.

    TODO(robinson): When we switch to a helper, this will return None.

    Returns:
      The number of bytes read from |serialized|.
      For non-group messages, this will always be len(serialized),
      but for messages which are actually groups, this will
      generally be less than len(serialized), since we must
      stop when we reach an END_GROUP tag.  Note that if
      we *do* stop because of an END_GROUP tag, the number
      of bytes returned does not include the bytes
      for the END_GROUP tag information.
    """
    raise NotImplementedError
def MergeFromString ( self , serialized ) : raise NotImplementedError