public Collection<PsiElement> getAdditionalElementsToDelete(
      @NotNull final PsiElement element,
      @NotNull final Collection<PsiElement> allElementsToDelete,
      final boolean askUser) {
    if (element instanceof PsiField) {
      PsiField field = (PsiField) element;
      final Project project = element.getProject();
      String propertyName =
          JavaCodeStyleManager.getInstance(project)
              .variableNameToPropertyName(field.getName(), VariableKind.FIELD);

      PsiClass aClass = field.getContainingClass();
      if (aClass != null) {
        boolean isStatic = field.hasModifierProperty(PsiModifier.STATIC);
        PsiMethod[] getters =
            GetterSetterPrototypeProvider.findGetters(aClass, propertyName, isStatic);
        if (getters != null) {
          final List<PsiMethod> validGetters = new ArrayList<>(1);
          for (PsiMethod getter : getters) {
            if (!allElementsToDelete.contains(getter) && (getter != null && getter.isPhysical())) {
              validGetters.add(getter);
            }
          }
          getters =
              validGetters.isEmpty()
                  ? null
                  : validGetters.toArray(new PsiMethod[validGetters.size()]);
        }

        PsiMethod setter = PropertyUtil.findPropertySetter(aClass, propertyName, isStatic, false);
        if (allElementsToDelete.contains(setter) || setter != null && !setter.isPhysical())
          setter = null;
        if (askUser && (getters != null || setter != null)) {
          final String message =
              RefactoringMessageUtil.getGetterSetterMessage(
                  field.getName(),
                  RefactoringBundle.message("delete.title"),
                  getters != null ? getters[0] : null,
                  setter);
          if (!ApplicationManager.getApplication().isUnitTestMode()
              && Messages.showYesNoDialog(
                      project,
                      message,
                      RefactoringBundle.message("safe.delete.title"),
                      Messages.getQuestionIcon())
                  != Messages.YES) {
            getters = null;
            setter = null;
          }
        }
        List<PsiElement> elements = new ArrayList<>();
        if (setter != null) elements.add(setter);
        if (getters != null) Collections.addAll(elements, getters);
        return elements;
      }
    }
    return null;
  }
  private static void addGetterSetterElements(
      CompletionResultSet result, PsiClass parent, Set<MethodSignature> addedSignatures) {
    int count = 0;
    for (PsiField field : parent.getFields()) {
      if (field instanceof PsiEnumConstant) continue;

      List<PsiMethod> prototypes = ContainerUtil.newSmartList();
      Collections.addAll(
          prototypes, GetterSetterPrototypeProvider.generateGetterSetters(field, true));
      Collections.addAll(
          prototypes, GetterSetterPrototypeProvider.generateGetterSetters(field, false));
      for (final PsiMethod prototype : prototypes) {
        if (parent.findMethodBySignature(prototype, false) == null
            && addedSignatures.add(prototype.getSignature(PsiSubstitutor.EMPTY))) {
          Icon icon = prototype.getIcon(Iconable.ICON_FLAG_VISIBILITY);
          result.addElement(
              createGenerateMethodElement(
                  prototype,
                  PsiSubstitutor.EMPTY,
                  icon,
                  "",
                  new InsertHandler<LookupElement>() {
                    @Override
                    public void handleInsert(InsertionContext context, LookupElement item) {
                      removeLookupString(context);

                      insertGenerationInfos(
                          context,
                          Collections.singletonList(new PsiGenerationInfo<PsiMethod>(prototype)));
                    }
                  }));

          if (count++ > 100) return;
        }
      }
    }
  }
  private static void prepareFieldRenaming(
      PsiField field, String newName, final Map<PsiElement, String> allRenames) {
    // search for getters/setters
    PsiClass aClass = field.getContainingClass();

    Project project = field.getProject();
    final JavaCodeStyleManager manager = JavaCodeStyleManager.getInstance(project);

    final String propertyName = PropertyUtil.suggestPropertyName(field, field.getName());
    final String newPropertyName = PropertyUtil.suggestPropertyName(field, newName);

    boolean isStatic = field.hasModifierProperty(PsiModifier.STATIC);

    PsiMethod[] getters = GetterSetterPrototypeProvider.findGetters(aClass, propertyName, isStatic);

    PsiMethod setter = PropertyUtil.findPropertySetter(aClass, propertyName, isStatic, false);

    boolean shouldRenameSetterParameter = false;

    if (setter != null) {
      shouldRenameSetterParameter = shouldRenameSetterParameter(manager, propertyName, setter);
    }

    if (getters != null) {
      List<PsiMethod> validGetters = new ArrayList<>();
      for (PsiMethod getter : getters) {
        String newGetterName =
            GetterSetterPrototypeProvider.suggestNewGetterName(
                propertyName, newPropertyName, getter);
        String getterId = null;
        if (newGetterName == null) {
          getterId = getter.getName();
          newGetterName =
              PropertyUtil.suggestGetterName(newPropertyName, field.getType(), getterId);
        }
        if (newGetterName.equals(getterId)) {
          continue;
        } else {
          boolean valid = true;
          for (PsiMethod method : getter.findDeepestSuperMethods()) {
            if (method instanceof PsiCompiledElement) {
              valid = false;
              break;
            }
          }
          if (!valid) continue;
        }
        validGetters.add(getter);
      }
      getters =
          validGetters.isEmpty() ? null : validGetters.toArray(new PsiMethod[validGetters.size()]);
    }

    String newSetterName = "";
    if (setter != null) {
      newSetterName = PropertyUtil.suggestSetterName(newPropertyName);
      final String newSetterParameterName =
          manager.propertyNameToVariableName(newPropertyName, VariableKind.PARAMETER);
      if (newSetterName.equals(setter.getName())) {
        setter = null;
        newSetterName = null;
        shouldRenameSetterParameter = false;
      } else if (newSetterParameterName.equals(
          setter.getParameterList().getParameters()[0].getName())) {
        shouldRenameSetterParameter = false;
      } else {
        for (PsiMethod method : setter.findDeepestSuperMethods()) {
          if (method instanceof PsiCompiledElement) {
            setter = null;
            shouldRenameSetterParameter = false;
            break;
          }
        }
      }
    }

    if ((getters != null || setter != null)
        && askToRenameAccesors(getters != null ? getters[0] : null, setter, newName, project)) {
      getters = null;
      setter = null;
      shouldRenameSetterParameter = false;
    }

    if (getters != null) {
      for (PsiMethod getter : getters) {
        String newGetterName =
            GetterSetterPrototypeProvider.suggestNewGetterName(
                propertyName, newPropertyName, getter);
        if (newGetterName == null) {
          newGetterName =
              PropertyUtil.suggestGetterName(newPropertyName, field.getType(), getter.getName());
        }
        addOverriddenAndImplemented(getter, newGetterName, null, propertyName, manager, allRenames);
      }
    }

    if (setter != null) {
      addOverriddenAndImplemented(
          setter,
          newSetterName,
          shouldRenameSetterParameter ? newPropertyName : null,
          propertyName,
          manager,
          allRenames);
    }
  }