Method _create_nulls_first

lib/sqlalchemy/sql/elements.py:3658–3665

(
        cls,
        column: _ColumnExpressionArgument[_T],
    )

    @classmethod
    def _create_nulls_first(
        cls,
        column: _ColumnExpressionArgument[_T],
    ) -> UnaryExpression[_T]:
        return UnaryExpression(
            coercions.expect(roles.ByOfRole, column),
            modifier=operators.nulls_first_op,
        )

    @classmethod
    def _create_nulls_last(