Function bevy_transform::hierarchy::parent_update_system

pub fn parent_update_system(
    commands: Commands<'_, '_>, 
    removed_parent_query: Query<'_, '_, (Entity, &PreviousParent), Without<Parent>>, 
    parent_query: Query<'_, '_, (Entity, &Parent, Option<&mut PreviousParent>), Changed<Parent>>, 
    children_query: Query<'_, '_, &mut Children>
)