code: private void processKeyValue(Map<ConfigurationKey, Object> properties, String stringKey, Object value) {
          processKeyValue(properties, stringKey, value, false);
      }
docs: Process the given string key and value. First try to convert the <code>stringKey</code> - unsupported keys are ignored. Then delegate to
  {@link #processKeyValue(Map, ConfigurationKey, Object)}.
  
  @param properties
  @param stringKey
  @param value