def METHOD_NAME(self, sub_chunk: Optional['TextLineChunkFTFont'] = None):
    """
    Stops a finished effect. Will leave effected text in the state it was in when effect
    ended. Used when an effect reaches a natural end where we might want to keep it in
    the end of effect state (e.g. a fade out)
    :param sub_chunk: An optional chunk so we only clear the effect from this chunk.
    """