code: public void setItems(java.util.Collection<PlaybackConfiguration> items) {
          if (items == null) {
              this.items = null;
              return;
          }
  
          this.items = new java.util.ArrayList<PlaybackConfiguration>(items);
      }
docs: <p>
  Array of playback configurations. This might be all the available configurations or a subset, depending on the
  settings that you provide and the total number of configurations stored.
  </p>
  
  @param items
  Array of playback configurations. This might be all the available configurations or a subset, depending on
  the settings that you provide and the total number of configurations stored.