Function select_tree_node 

pub fn select_tree_node(
    selected: Signal<String>,
    on_select: Option<Rc<dyn Fn(&'static str)>>,
    value: &'static str,
)

Selects a node and reports the selection to the caller.

The node’s value is written into the caller-owned selected signal and the on_select callback is called with it, so a caller can react to the selection without subscribing to the signal itself.

Arguments

• Signal<String> - The selected-value signal.
• Option<Rc<dyn Fn(&'static str)>> - The select callback.
• &'static str - The selected node’s value.