public static @NotNull PsiElement addProperty(@NotNull JsonObject object, @NotNull JsonProperty property, boolean first) {
    final List<JsonProperty> propertyList = object.getPropertyList();
    if (!first) {
      final JsonProperty lastProperty = ContainerUtil.getLastItem(propertyList);
      if (lastProperty != null) {
        final PsiElement addedProperty = object.addAfter(property, lastProperty);
        object.addBefore(new JsonElementGenerator(object.getProject()).createComma(), addedProperty);
        return addedProperty;
      }
    }
    final PsiElement leftBrace = object.getFirstChild();
    assert hasElementType(leftBrace, JsonElementTypes.L_CURLY);
    final PsiElement addedProperty = object.addAfter(property, leftBrace);
    if (!propertyList.isEmpty()) {
      object.addAfter(new JsonElementGenerator(object.getProject()).createComma(), addedProperty);
    }
    return addedProperty;
  }
public static @NotNull PsiElement addProperty(@NotNull JsonObject object, @NotNull JsonProperty property, boolean first)