@NotNull
  public static LanguageInjectionSupport findNotNullInjectionSupport(@NotNull String id) {
    LanguageInjectionSupport result = findInjectionSupport(id);
    if (result == null) {
      throw new IllegalStateException(id + " injector not found");
    }
    return result;
  }
@NotNull
  public static LanguageInjectionSupport findNotNullInjectionSupport(@NotNull String id)