docs: @SuppressWarnings("unchecked")
      public <U> SimpleReactStream<U> fromIterable(final Iterable<U> iter) {
          if(iter instanceof SimpleReactStream){
              return (SimpleReactStream<U>)iter;
          }
          return this.from(StreamSupport.stream(Spliterators.spliteratorUnknownSize(iter.iterator(), Spliterator.ORDERED), false));
  
      }