Function resolved_lambda_var

datafusion/expr/src/higher_order_function.rs:1678–1683

(name: &str, dt: DataType, nullable: bool)

    }

    fn resolved_lambda_var(name: &str, dt: DataType, nullable: bool) -> Expr {
        Expr::LambdaVariable(LambdaVariable::new(
            name.into(),
            Some(Arc::new(Field::new(name, dt, nullable))),
        ))
    }
}