docs: @edu.umd.cs.findbugs.annotations.SuppressFBWarnings("DM_GC")
      @RequirePOST
      public void doGc(StaplerResponse rsp) throws IOException {
          checkPermission(Jenkins.ADMINISTER);
          System.gc();
          rsp.setStatus(HttpServletResponse.SC_OK);
          rsp.setContentType("text/plain");
          rsp.getWriter().println("GCed");
      }