Есть ли способ Mock частного вызова метода внутри другого метода в Junit5

Ниже приведен метод, который я хотел протестировать, но, насколько мне известно, Junit5 не поддерживает PowerMockito. Так есть ли способ, которым я могу смоделировать вызов частного метода внутри другого метода?

public Class MyClass {    


private void sendEmailNotification(Checklist Checklist){
    EmailService emailService = new EmailService();
    BaseDTO esDO = newFolderService.getFolderByUri(ServicesUtils.getDecodedCaseNodeUriFromSelfLink(Checklist.getEs_uri()));
    String esName = esDO.getName();
    SharedInfo sharedInfo = Checklist.getShared_info();
    sharedInfo.setEng_space_name(esName);
    String reviewer = Checklist.getReviewer();
    String ChecklistUri = Checklist.getUri();
    String ChecklistName = Checklist.getName();
    String targetPhase = Checklist.getTarget_phase();
    String comment = Checklist.getComment();
    String submitter = Checklist.getSubmitter();
    String appURL = Checklist.getShared_info().getApp_url();
    String ChecklistLink = buildChecklistURL(appURL, ChecklistUri);
    String emailBodyTemplate;
    String emailSubject;

      emailBodyTemplate = EmailTemplates.getEmailTemplateByName(EmailConstants.TEMPLATE_DELIVERABLE_ACCEPTED_REJECTED_WITH_COMMENTS);
      emailSubject = String.format(EmailConstants.ACCEPT_REJECT_WITH_COMMENTS_SUBJECT, ChecklistName, targetPhase);
      emailBodyTemplate = EmailTemplates.replaceSharedVariable(emailBodyTemplate, sharedInfo);
      emailBodyTemplate = EmailTemplates.replaceVariable(emailBodyTemplate, EmailConstants.VAR_TARGET_PHASE, targetPhase);
      emailBodyTemplate = EmailTemplates.replaceVariable(emailBodyTemplate, EmailConstants.VAR_REVIEWER, reviewer);
      emailBodyTemplate = EmailTemplates.replaceVariable(emailBodyTemplate, EmailConstants.VAR_CHECKLIST_ITEM_NAME, ChecklistName);
      emailBodyTemplate = EmailTemplates.replaceVariable(emailBodyTemplate, EmailConstants.VAR_COMMENT, comment);
      emailBodyTemplate = EmailTemplates.replaceVariable(emailBodyTemplate, EmailConstants.VAR_CHECKLIST_ITEM_URL, ChecklistLink);
    try {
      emailService.sendEmail(submitter, EmailConstants.EMAIL_SENDER, emailSubject, emailBodyTemplate);
    } catch (RuntimeException e) {
      Checklist.addError(messages.get(E_ACCEPT_REJECT_SEND_EMAIL));
    }

}

//Method to be tested

public void method(Checklist checklist){

  /*Some Code*/

  sendEmail(checklist);  /* want to ignore this, as throwing NullPointerException*/

  /*Some Code*/

}}