code: public AnyValueMap getAsMap(String key) {
  		Object value = getAsObject(key);
  		return AnyValueMap.fromValue(value);
  	}
docs: Converts map element into an AnyValueMap or returns empty AnyValueMap if
  conversion is not possible.
  
  @param key a key of element to get.
  @return AnyValueMap value of the element or empty AnyValueMap if conversion
  is not supported.
  
  @see #fromValue(Object)