3 0f 3 challenge for last Java data structures quiz.

package com.example.model;

import java.util.List;

public class Course {
  private String mName;
  private List<Video> mVideos; 

  public Course(String name, List<Video> videos) {
    mName = name;
    mVideos = videos;
  }

  public String getName() {
    return mName;
  }

  public List<Video> getVideos() {
    return mVideos;
  }

}

package com.example.model;

public class Video {
  private String mTitle;

  public Video(String title) {
    mTitle = title;
  }

  public String getTitle() {
    return mTitle;
  }

  public void setTitle(String title) {
    mTitle = title;
  }

}

import com.example.model.Course;
import com.example.model.Video;

import java.util.Map;
import java.util.TreeMap;

import java.util.ArrayList;
import java.util.Arrays;


public class QuickFix {

  public void addForgottenVideo(Course course) {
    Video newVideo = new Video("What up?");

    course.getVideos().add(1, newVideo);

  }

  public void fixVideoTitle(Course course, String oldTitle, String newTitle) {


  }

  public Map<String, Video> videosByTitle(Course course) {
   Map<String, Video> byTitle = new TreeMap<String, Video>();


    for (Video video : course.getVideos()) {
            byTitle.put(video.getTitle(), video);
        }
    return byTitle;
  }

}