code: public long getAsLongWithDefault(String key, long defaultValue) {
  		Object value = getAsObject(key);
  		return LongConverter.toLongWithDefault(value, defaultValue);
  	}
docs: Converts map element into a long or returns default value if conversion is
  not possible.
  
  @param key          a key of element to get.
  @param defaultValue the default value
  @return long value of the element or default value if conversion is not
  supported.
  
  @see LongConverter#toLongWithDefault(Object, long)