* use the {@code HashSet} constructor directly, taking advantage of <a
   * href="https://docs.oracle.com/javase/tutorial/java/generics/genTypeInference.html#type-inference-instantiation">"diamond"
   * syntax</a>.
   */
  @SuppressWarnings("NonApiType") // acts as a direct substitute for a constructor call
  public static <E extends @Nullable Object> HashSet<E> newHashSet() {
    return new HashSet<>();
  }

  /**

		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrUnsupportedSyntax: {
		Code:           "UnsupportedSyntax",
		Description:    "Encountered invalid syntax.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrUnsupportedRangeHeader: {
		Code:           "UnsupportedRangeHeader",
		Description:    "Range header is not supported for this operation.",