def METHOD_NAME(cls, target: Class, content: DtdContent):
    if content.left and content.left.type == DtdContentType.PCDATA:
        target.mixed = True
        content.left = None
    elif content.right and content.right.type == DtdContentType.PCDATA:
        target.mixed = True
        content.right = None
    target.tag = Tag.COMPLEX_TYPE
    cls.build_content(target, content)