@Override
  public SuccessType getMessage() {
    throw new RuntimeException("This Result is not of type Success.");
  }
Creates a {@link Failure} object containing the errorMessage

@param <T> the type of the result
@param errorMessage the error message describing the reason for failure.
@param throwable the throwable that caused the failure
@return an {@link Failure} instance containing the errorMessage
geode-core/src/main/java/org/apache/geode/services/result/impl/Failure.java