code: public Mapper<K, V> deepLook() {
  	    if (!(delegate.get() instanceof DeepLookMap)) {
  	        delegate = Optional.of((Map<K, V>) DeepLookMap.from(delegate.get()));
  	    }
  		return this;
  	}
docs: Returns the {@link DeepLookMap} instance (Lookup key deep into within map)
  
  @return