code: public static <K, V> RubyHash<K, V> rh(K key1, V value1, K key2, V value2) {
      RubyHash<K, V> rh = newRubyHash();
      rh.put(key1, value1);
      rh.put(key2, value2);
      return rh;
    }
docs: Creates a {@link RubyHash} by given key-value pairs.
  
  @param <K>
  the type of the key elements
  @param <V>
  the type of the value elements
  @param key1
  of entry 1
  @param value1
  of entry 1
  @param key2
  of entry 2
  @param value2
  of entry 2
  @return {@link RubyHash}