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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def does_sqlatype_require_index_len( coltype: Union[TypeEngine, VisitableType]) -> bool: """ Is the SQLAlchemy column type one that requires its indexes to have a length specified? (MySQL, at least, requires index length to be specified for ``BLOB`` and ``TEXT`` columns: http://dev.mysql.com/doc/refman/5.7/en/create-index.html.) """

    coltype = _coltype_to_typeengine(coltype)
    if isinstance(coltype, sqltypes.Text):
        return True
    if isinstance(coltype, sqltypes.LargeBinary):
        return True
    return False