code: public java.util.List<String> getLayerIds() {
          if (layerIds == null) {
              layerIds = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return layerIds;
      }
docs: <p>
  The layer ID, which must correspond to a custom layer. You cannot assign a registered instance to a built-in
  layer.
  </p>
  
  @return The layer ID, which must correspond to a custom layer. You cannot assign a registered instance to a
  built-in layer.