Extract a single frame from the data buffer.  The consumed
        data should be removed from the buffer.  If no complete frame
        can be read, must raise a ``NoFrames`` exception.

        :param data: A ``bytearray`` instance containing the data so
                     far read.
        :param state: An instance of ``FramerState``.  If the buffer
                      contains a partial frame, this object can be
                      used to store state information to allow the
                      remainder of the frame to be read.

        :returns: A frame.  The frame may be any object.  The stock
                  framers always return bytes.

def to_frame(self, data, state):
        """
        Extract a single frame from the data buffer.  The consumed
        data should be removed from the buffer.  If no complete frame
        can be read, must raise a ``NoFrames`` exception.

        :param data: A ``bytearray`` instance containing the data so
                     far read.
        :param state: An instance of ``FramerState``.  If the buffer
                      contains a partial frame, this object can be
                      used to store state information to allow the
                      remainder of the frame to be read.

        :returns: A frame.  The frame may be any object.  The stock
                  framers always return bytes.
        """

        # If we've read all the data, let the caller know
        if state.chunk_remaining <= 0:
            raise exc.NoFrames()

        # OK, how much data do we send on?
        data_len = min(state.chunk_remaining, len(data))

        # Extract that data from the buffer
        frame = six.binary_type(data[:data_len])
        del data[:data_len]

        # Update the state
        state.chunk_remaining -= data_len

        # Return the frame
        return frame