def is_sqlatype_binary(coltype: Union[TypeEngine, VisitableType]) -> bool:
    """
    Is the SQLAlchemy column type a binary type?
    """
    # Several binary types inherit internally from _Binary, making that the
    # easiest to check.
    coltype = _coltype_to_typeengine(coltype)
    # noinspection PyProtectedMember
    return isinstance(coltype, sqltypes._Binary)
Is the SQLAlchemy column type a binary type?