pub fn create_multiple_physical_plans(
roots: &[Node],
lp_arena: &mut Arena<IR>,
expr_arena: &mut Arena<AExpr>,
build_streaming_executor: Option<StreamingExecutorBuilder>,
) -> PolarsResult<MultiplePhysicalPlans>pub fn create_multiple_physical_plans(
roots: &[Node],
lp_arena: &mut Arena<IR>,
expr_arena: &mut Arena<AExpr>,
build_streaming_executor: Option<StreamingExecutorBuilder>,
) -> PolarsResult<MultiplePhysicalPlans>