code: protected CmsXmlContentTypeManager getXmlContentTypeManager() {
  
          if (m_xmlContentTypeManager != null) {
              return m_xmlContentTypeManager;
          }
          if (getRunLevel() == OpenCms.RUNLEVEL_1_CORE_OBJECT) {
              // this is only to enable test cases to run
              m_xmlContentTypeManager = CmsXmlContentTypeManager.createTypeManagerForTestCases();
          }
          return m_xmlContentTypeManager;
      }
docs: Returns the XML content type manager.<p>
  
  @return the XML content type manager