docs: @Override
      public Enumeration<String> getHeaders(String hdr) {
          List<String> rc = this.request.getHeaders(hdr);
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
              Tr.debug(tc, "getHeaders: " + hdr + " " + rc.size());
          }
          return Collections.enumeration(rc);
      }