pub fn to_substrait_groupings(
producer: &mut impl SubstraitProducer,
exprs: &[Expr],
schema: &DFSchemaRef,
) -> Result<(Vec<Expression>, Vec<Grouping>)>
pub fn to_substrait_groupings(
producer: &mut impl SubstraitProducer,
exprs: &[Expr],
schema: &DFSchemaRef,
) -> Result<(Vec<Expression>, Vec<Grouping>)>