docs: public void replaceField(String sourceField, String targetField, String oldString, String newString) {
          TransformationStep step = new TransformationStep();
          step.setSourceFields(sourceField);
          step.setTargetField(targetField);
          step.setOperationParameter(TransformationConstants.REPLACE_OLD_PARAM, oldString);
          step.setOperationParameter(TransformationConstants.REPLACE_NEW_PARAM, newString);
          step.setOperationName("replace");
          steps.add(step);
      }