code: public void updateModelPageDisabledState(CmsUUID entryId, boolean disabled) {
  
          if (m_modelPageTreeItems.containsKey(entryId)) {
              m_modelPageTreeItems.get(entryId).setDisabled(disabled);
          } else if (m_parentModelPageTreeItems.containsKey(entryId)) {
              m_parentModelPageTreeItems.get(entryId).setDisabled(disabled);
          }
      }
docs: Updates the disabled state for the given model page.<p>
  
  @param entryId the model page id
  @param disabled the disabled state