code: public void setUserLastModified(String userLastModified) {
  
          if (null == userLastModified) { // The optional user last modified information is not provided
              m_resourceBuilder.setUserLastModified(getRequestContext().getCurrentUser().getId());
          } else { // use the user last modified information from the manifest
              try {
                  String userLastModifiedName = OpenCms.getImportExportManager().translateUser(userLastModified);
                  try {
                      m_resourceBuilder.setUserLastModified(getCms().readUser(userLastModifiedName).getId());
                  } catch (@SuppressWarnings("unused") CmsDbEntryNotFoundException e) {
                      m_resourceBuilder.setUserLastModified(getRequestContext().getCurrentUser().getId());
                  }
              } catch (Throwable e) {
                  setThrowable(e);
              }
          }
  
      }
docs: Sets the userLastModified.<p>
  
  @param userLastModified the userLastModified to set
  
  @see #N_USERLASTMODIFIED
  @see #addResourceAttributesRules(Digester, String)