code: function(moduleName,      // @arg ModuleNameString
                        moduleClosure) { // @arg JavaScriptCodeString
                                         // @ret ModuleObject
          var wm = this; // GLOBAL.WebModule
  
          // https://github.com/uupaa/WebModule/wiki/SwitchModulePattern
          var alias = wm[moduleName] ? (moduleName + "_") : moduleName;
  
          if (!wm[alias]) { // secondary module already exported -> skip
              wm[alias] = moduleClosure(GLOBAL, wm, wm.VERIFY, wm.VERBOSE); // evaluate the module entity.
              wm.CODE[alias] = moduleClosure + ""; // store to the container.
  
              if (wm.PUBLISH && !GLOBAL[alias]) {
                  GLOBAL[alias] = wm[alias]; // module publish to global namespace.
              }
          }
          return wm[alias];
      }
docs: publish flag, module publish to global namespace.