code: private void startFixture(final String uuid, final FixtureResult result) {
          storage.put(uuid, result);
          result.setStage(Stage.RUNNING);
          result.setStart(System.currentTimeMillis());
          threadContext.clear();
          threadContext.start(uuid);
      }
docs: Start a new fixture with given uuid.
  
  @param uuid   the uuid of fixture.
  @param result the test fixture.