pub trait VisitorMut {
// Provided methods
fn on_syntax_down(&mut self, node: &mut Node, ctl: &mut JourneyControls) { ... }
fn on_syntax_up(&mut self, node: &mut Node) { ... }
fn visit_class_or_object_key(&mut self, key: &mut ClassOrObjectMemberKey) { ... }
fn visit_class_or_object_value(
&mut self,
value: &mut ClassOrObjectMemberValue,
) { ... }
fn visit(&mut self, n: &mut Node) { ... }
}