docs: private String getLegend() {
  
          switch (m_mode) {
              case sources:
                  return org.opencms.gwt.client.Messages.get().key(
                      org.opencms.gwt.client.Messages.GUI_RESOURCE_INFO_TAB_USAGE_0);
              case targets:
  
                  return org.opencms.gwt.client.Messages.get().key(
                      org.opencms.gwt.client.Messages.GUI_RESOURCE_INFO_TAB_TARGETS_0);
              case siblings:
              default:
                  return org.opencms.gwt.client.Messages.get().key(
                      org.opencms.gwt.client.Messages.GUI_RESOURCE_INFO_TAB_SIBLINGS_0);
  
          }
  
      }