private void loadMetadata() {
    final List<UIThemeMetadata> themeMetadata = ContainerUtil.mapNotNull(EP_NAME.getExtensionList(), UIThemeMetadataProvider::loadMetadata);
    for (UIThemeMetadata metadata : themeMetadata) {
      myCache.put(metadata, ContainerUtil.newMapFromValues(metadata.getUiKeyMetadata().iterator(), o -> o.getKey()));
    }
  }
private void loadMetadata()