code: def of(cls, msg_header: MessageHeader) -> 'MessageDecoder':
          
          cte_hdr = msg_header.parsed.content_transfer_encoding
          return cls.of_cte(cte_hdr)
docs: Return a decoder from the message header object.
  
          See Also:
              :meth:`.of_cte`
  
          Args:
              msg_header: The message header object.