src/main/java/board/Board.java
public void removeTopic(Topic topic) throws BoardException {
    if (!topics.containsKey(topic)) {
      throw new TopicDoesntExistException();
    }
    topics.remove(topic);
  }
/**
   * removeTopic removes the Topic from the Board along with all associated
   * Notes.
   *
   * @throws BoardException If the Topic isn't on the Board.
   */
removeTopic removes the Topic from the Board along with all associated
Notes.

@throws BoardException If the Topic isn't on the Board.
removeTopic removes the Topic from the Board along with all associated Notes . @throws BoardException If the Topic isn ' t on the Board .
public void removeTopic(Topic topic) throws BoardException {
    if (!topics.containsKey(topic)) {
      throw new TopicDoesntExistException();
    }
    topics.remove(topic);
  }
public void removeTopic ( Topic topic ) throws BoardException { if ( ! topics . containsKey ( topic ) ) { throw new TopicDoesntExistException ( ) ; } topics . remove ( topic ) ; }
removeTopic removes the Topic from the Board along with all associated
 Notes.
removeTopic removes the Topic from the Board along with all associated Notes .