如何在ANTLR中找到儿童上下文的子项？

import org.antlr.v4.runtime.tree.TerminalNode;
import YourGrammarParser.*;

public class CustomVisitor extends YourGrammarBaseVisitor<Void> {

    @Override
    public Void visitChildrenContext(ChildrenContextContext ctx) {
        // 获取儿童上下文的子项
        for (int i = 0; i < ctx.getChildCount(); i++) {
            ParseTree child = ctx.getChild(i);
            // 处理子项逻辑
            if (child instanceof TerminalNode) {
                TerminalNode terminalNode = (TerminalNode) child;
                // 处理终结符节点逻辑
                // ...
            } else if (child instanceof ChildrenContextContext) {
                ChildrenContextContext childContext = (ChildrenContextContext) child;
                // 处理儿童上下文节点逻辑
                // ...
            }
        }
        return super.visitChildrenContext(ctx);
    }
}