static void addExplicitInitializer(@NotNull PsiVariable var) {
    PsiExpression currentInitializer = var.getInitializer();
    if (currentInitializer != null) return;
    PsiType type = var.getType();
    String initializerText = PsiTypesUtil.getDefaultValueOfType(type);
    if (!PsiKeyword.NULL.equals(initializerText)) {
      WriteAction.run(() -> {
        PsiExpression initializer = JavaPsiFacade.getElementFactory(var.getProject()).createExpressionFromText(initializerText, var);
        var.setInitializer(initializer);
      });
    }
  }
static void addExplicitInitializer(@NotNull PsiVariable var)