code: public void actionDelete() throws JspException {
  
          // save initialized instance of this class in request attribute for included sub-elements
          getJsp().getRequest().setAttribute(SESSION_WORKPLACE_CLASS, this);
          try {
              getCms().deletePropertyDefinition(getParamPropertyName());
              // close the dialog
              actionCloseDialog();
          } catch (Throwable e) {
              // error while deleting property definition, show error dialog
              includeErrorpage(this, e);
          }
      }
docs: Deletes the property definition.<p>
  
  @throws JspException if problems including sub-elements occur