Interface Visitor<N>

interface Visitor<N extends Node = Node> {
    onDetail(root: N, state: any): void;
    onEnd(root: N, state: any): void;
    onStart(root: N, state: any): void;
    onSummary(root: N, state: any): void;
    onSummaryEnd(root: N, state: any): void;
}