@classmethod
    def _create_nullsfirst(cls, column):
        return UnaryExpression(
            _literal_as_text(column), modifier=operators.nullsfirst_op)
Produce the ``NULLS FIRST`` modifier for an ``ORDER BY`` expression.
dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/sqlalchemy/sql/elements.py/UnaryExpression._create_nullsfirst