guava/src/com/google/common/collect/FluentIterable.java
@Beta
  public static <E> FluentIterable<E> of() {
    return FluentIterable.from(ImmutableList.<E>of());
  }
@Beta
  public static <E> FluentIterable<E> of() {
    return FluentIterable.from(ImmutableList.<E>of());
  }
Returns a fluent iterable containing no elements.

<p><b>{@code Stream} equivalent:</b> {@link Stream#empty}.

@since 20.0