docs: public void addType(String type) {
          try {
              messageCreators.add(Class.forName(type).newInstance());
          } catch (ClassNotFoundException | IllegalAccessException e) {
              throw new CitrusRuntimeException("Unable to access message creator type: " + type, e);
          } catch (InstantiationException e) {
              throw new CitrusRuntimeException("Unable to create  message creator instance of type: " + type, e);
          }
      }