code: public static void ensureNotNull(String parameterName, Object value) {
      if(value == null) {
        throw LOG.parameterIsNullException(parameterName);
      }
    }
docs: Ensures that the parameter is not null.
  
  @param parameterName the parameter name
  @param value the value to ensure to be not null
  @throws IllegalArgumentException if the parameter value is null