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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 _check_row_table_name(table_name, row):
 """Checks that a row belongs to a table. :type table_name: str :param table_name: The name of the table. :type row: :class:`~google.cloud.bigtable.row.Row` :param row: An instance of :class:`~google.cloud.bigtable.row.Row` subclasses. :raises: :exc:`~.table.TableMismatchError` if the row does not belong to the table. """

    if row.table is not None and row.table.name != table_name:
        raise TableMismatchError(
            "Row %s is a part of %s table. Current table: %s"
            % (row.row_key, row.table.name, table_name)
        )