code: public java.util.List<LayerVersionsListItem> getLayerVersions() {
          if (layerVersions == null) {
              layerVersions = new com.amazonaws.internal.SdkInternalList<LayerVersionsListItem>();
          }
          return layerVersions;
      }
docs: <p>
  A list of versions.
  </p>
  
  @return A list of versions.