code: private JavaColonNamespaceBindings<EJBBinding> getModuleBindingMap(ModuleMetaData mmd) {
          @SuppressWarnings("unchecked")
          JavaColonNamespaceBindings<EJBBinding> bindingMap = (JavaColonNamespaceBindings<EJBBinding>) mmd.getMetaData(mmdSlot);
          if (bindingMap == null) {
              bindingMap = new JavaColonNamespaceBindings<EJBBinding>(NamingConstants.JavaColonNamespace.MODULE, this);
              mmd.setMetaData(mmdSlot, bindingMap);
          }
          return bindingMap;
      }
docs: Get the EJBBinding map from the module meta data. Initialize if it
  is null.
  
  @param mmd
  @return Map for the lookup names and binding object.