code: public void insertBefore(final IWizardElement _element)
      {
          int i = 0;
          for (final IWizardElement uiObject : this.elements) {
              if (uiObject == this.current) {
                  this.elements.add(i, _element);
                  break;
              }
              i++;
          }
      }
docs: Insert a UIObject before the current one.
  
  @param _element Object to insert