title: Bukkit ConfigurationSection getKeys
body: <p>I have a bukkit config file that looks like this:</p>
  
  <pre><code>effected mobs:
    skeleton:
      lower hp limit: 0
      upper hp limit: 0
    zombie:
      lower hp limit: 0
      upper hp limit: 0
    spider:
      lower hp limit: 0
      upper hp limit: 0
  </code></pre>
  
  <p>I'm trying to get a set that contains [skeleton, zombie, spider] and any others that may be added by giving it the key "effected mobs". I have looked at this similar <a href="https://stackoverflow.com/questions/9648549/bukkit-get-all-values-under-yaml-path">question</a> 
  and tried the following code: </p>
  
  <pre><code>public class Main extends JavaPlugin implements Listener{
      public FileConfiguration config;
      public Set&lt;String&gt; mobsEffected;
  
      public void onEnable(){
          config = getConfig();
          mobsEffected = config.getConfigurationSection("effected mobs").getKeys(false);
          Bukkit.getLogger().info(String.valueOf(mobsEffected.size() ));
  
      }
  }
  </code></pre>
  
  <p>but the size is logged as 0, when it should be 3. Any advice?</p>