code: public static <K, V> HashMapJsonDeserializer<K, V> newInstance( KeyDeserializer<K> keyDeserializer,
                                                                      JsonDeserializer<V> valueDeserializer ) {
          return new HashMapJsonDeserializer<K, V>( keyDeserializer, valueDeserializer );
      }
docs: <p>newInstance</p>
  
  @param keyDeserializer {@link KeyDeserializer} used to deserialize the keys.
  @param valueDeserializer {@link JsonDeserializer} used to deserialize the values.
  @param <K> Type of the keys inside the {@link HashMap}
  @param <V> Type of the values inside the {@link HashMap}
  @return a new instance of {@link HashMapJsonDeserializer}