code: @Nonnull
      @SafeVarargs
      public static <A> ImmutableList<A> from(@Nonnull A... el) {
          return fromBounded(el, 0, el.length);
      }
docs: A helper constructor to create a potentially empty {@link ImmutableList}.
  
  @param el  Elements of the list
  @param <A> The type of elements
  @return a <code>ImmutableList</code> of type <code>A</code>.