Method field

datafusion/functions-window/src/lead_lag.rs:287–295

(&self, field_args: WindowUDFFieldArgs)

    }

    fn field(&self, field_args: WindowUDFFieldArgs) -> Result<FieldRef> {
        let return_field = parse_expr_field(field_args.input_fields())?;

        Ok(return_field
            .as_ref()
            .clone()
            .with_name(field_args.name())
            .into())
    }

    fn reverse_expr(&self) -> ReversedUDWF {
        match self.kind {