You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: _653_two_sum_4.rs
    path of file: ./repos/rustgym/leetcode/src/d6
    
    the code of the file until where you have to start completion: struct Solution;
use rustgym_util::*;
use std::cmp::Ordering::*;

trait Inorder {
    fn inorder(&self, v: &mut Vec<i32>, target: i32);
}

impl Inorder for TreeLink {
    fn inorder(&self, v: &mut Vec
    
    fn inorder(&self, v: &mut Vec<i32>, target: i32) {
        if let Some(node) = self {
            let node = node.borrow();
            let left = &node.left;
            let right = &node.right;
            Self::inorder(left, v, target);
            v.push(node.val);
            Self::inorder(right, v, target);
        }
    }