docs: protected void createInitialAuthenticationRequestValidationCheckAction(final Flow flow) {
          val action = createActionState(flow, CasWebflowConstants.STATE_ID_INITIAL_AUTHN_REQUEST_VALIDATION_CHECK,
              CasWebflowConstants.ACTION_ID_INITIAL_AUTHN_REQUEST_VALIDATION);
          createTransitionForState(action, CasWebflowConstants.TRANSITION_ID_AUTHENTICATION_FAILURE, CasWebflowConstants.STATE_ID_HANDLE_AUTHN_FAILURE);
          createTransitionForState(action, CasWebflowConstants.TRANSITION_ID_ERROR, CasWebflowConstants.STATE_ID_INIT_LOGIN_FORM);
          createTransitionForState(action, CasWebflowConstants.TRANSITION_ID_SUCCESS, CasWebflowConstants.STATE_ID_TICKET_GRANTING_TICKET_CHECK);
          createTransitionForState(action, CasWebflowConstants.TRANSITION_ID_SUCCESS_WITH_WARNINGS, CasWebflowConstants.STATE_ID_SHOW_AUTHN_WARNING_MSGS);
      }