code: protected void assertNotNullOrEmpty(String value, String message) throws IllegalArgumentException {
          if (value == null || value.length() == 0) {
              throw new IllegalArgumentException(message);
          }
      }
docs: Assert that the value is not null or empty.
  
  @param value   the value
  @param message the message to include with any exceptions
  
  @throws IllegalArgumentException if value is null