code: protected void addModulePackagesIndex(Content body, ModuleElement mdle) {
          addModulePackagesIndexContents("doclet.Module_Summary",
                  configuration.getText("doclet.Member_Table_Summary",
                  configuration.getText("doclet.Module_Summary"),
                  configuration.getText("doclet.modules")), body, mdle);
      }
docs: Adds the frame or non-frame module packages index to the documentation tree.
  
  @param body the document tree to which the index will be added
  @param mdle the module being documented