Function node_directions 

pub fn node_directions(
    root: &UiNode,
    surface: TextDirection,
    ctx: Option<&ConditionContext>,
) -> IndexMap<String, TextDirection>

Every node’s direction: its own style direction (resolved against ctx when given), else its parent’s; the root’s parent is the surface. Slots inherit from their owner. A template’s items take the direction of the node that renders them.