Function datafusion::physical_plan::with_new_children_if_necessary

pub fn with_new_children_if_necessary(
    plan: Arc<dyn ExecutionPlan>,
    children: Vec<Arc<dyn ExecutionPlan>>
) -> Result<Transformed<Arc<dyn ExecutionPlan>>>

Returns a copy of this plan if we change any child according to the pointer comparison. The size of children must be equal to the size of ExecutionPlan::children().