This task is impossible to complete as there is no method for updating keys in a hashmap or map interface

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.*;

public class QuickFix {

  public void addForgottenVideo(Course course) {
    // TODO(1):  Create a new video called "The Beginning Bits"
    Video vid = new Video("The Beginning Bits");

    // TODO(2):  Add the newly created video to the course videos as the second video.
           course.getVideos().add(1,vid);
  }

  public void fixVideoTitle(Course course, String oldTitle, String newTitle) {
    Map<String, Video> map = videosByTitle(course);

    Video b = map.get(oldTitle);

    map.remove(oldTitle);

    map.put(newTitle,b);


  }

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

    for(Video vid: course.getVideos()){
         v.put(vid.getTitle(),vid);
    }

    return v;
  }

}