public String[] getSuggestedNames() {
  final LinkedHashSet<String> result = new LinkedHashSet<String>();
  final String initialName = VariableInplaceRenameHandler.getInitialName();
  if (initialName != null) {
    result.add(initialName);
  }
  result.add(UsageViewUtil.getShortName(myPsiElement));
  final NameSuggestionProvider[] providers = Extensions.getExtensions(NameSuggestionProvider.EP_NAME);
  for(NameSuggestionProvider provider: providers) {
    SuggestedNameInfo info = provider.getSuggestedNames(myPsiElement, myNameSuggestionContext, result);
    if (info != null) {
      mySuggestedNameInfo = info;
      if (provider instanceof PreferrableNameSuggestionProvider && !((PreferrableNameSuggestionProvider)provider).shouldCheckOthers()) break;
    }
  }
  return ArrayUtil.toStringArray(result);
}
 

@Nullable
@Override
public SuggestedNameInfo getSuggestedNames(PsiElement psiElement, PsiElement psiElement1, Set<String> set) {

    if(!(psiElement instanceof Parameter)) {
        return null;
    }

    List<String> filter = ContainerUtil.filter(PhpNameSuggestionUtil.variableNameByType((Parameter) psiElement, psiElement.getProject(), false), s -> !StringUtil.containsChar(s, '\\'));

    if(filter.size() == 0) {
        return null;
    }

    for (String item : filter) {

        for(String end: TRIM_STRINGS) {

            // ending
            if(item.toLowerCase().endsWith(end)) {
                item = item.substring(0, item.length() - end.length());
            }

            // remove starting
            if(item.toLowerCase().startsWith(end)) {
                item = WordUtils.uncapitalize(item.substring(end.length()));
            }
        }

        if(StringUtils.isNotBlank(item)) {
            set.add(item);
        }
    }

    return null;
}
 

@Nullable
@Override
public SuggestedNameInfo getSuggestedNames(PsiElement psiElement, PsiElement psiElement1, Set<String> set) {

    if(!(psiElement instanceof Parameter)) {
        return null;
    }

    List<String> filter = ContainerUtil.filter(PhpNameSuggestionUtil.variableNameByType((Parameter) psiElement, psiElement.getProject(), false), s -> !StringUtil.containsChar(s, '\\'));

    if(filter.size() == 0) {
        return null;
    }

    for (String item : filter) {

        for(String end: TRIM_STRINGS) {

            // ending
            if(item.toLowerCase().endsWith(end)) {
                item = item.substring(0, item.length() - end.length());
            }

            // remove starting
            if(item.toLowerCase().startsWith(end)) {
                item = WordUtils.uncapitalize(item.substring(end.length()));
            }
        }

        if(StringUtils.isNotBlank(item)) {
            set.add(item);
        }
    }

    return null;
}
 

@Nullable
@Override
public SuggestedNameInfo getSuggestedNames(PsiElement element, @Nullable PsiElement nameSuggestionContext, Set<String> result)
{
	if(element.getLanguage() != CSharpLanguage.INSTANCE)
	{
		return null;
	}

	Iterator<String> iterator = result.iterator();
	while(iterator.hasNext())
	{
		String next = iterator.next();

		if(CSharpNameSuggesterUtil.isKeyword(next))
		{
			iterator.remove();
		}
	}

	if(element instanceof DotNetVariable)
	{
		Collection<String> names = CSharpNameSuggesterUtil.getSuggestedVariableNames((DotNetVariable) element);
		result.addAll(names);
		return new SuggestedNameInfo(ArrayUtil.toStringArray(names))
		{
		};
	}
	return null;
}
 

private static LookupElement[] initLookupItems(LinkedHashSet<String> names,
                                               PsiNamedElement elementToRename, 
                                               PsiElement nameSuggestionContext,
                                               final boolean shouldSelectAll) {
  if (names == null) {
    names = new LinkedHashSet<String>();
    for (NameSuggestionProvider provider : Extensions.getExtensions(NameSuggestionProvider.EP_NAME)) {
      final SuggestedNameInfo suggestedNameInfo = provider.getSuggestedNames(elementToRename, nameSuggestionContext, names);
      if (suggestedNameInfo != null &&
          provider instanceof PreferrableNameSuggestionProvider &&
          !((PreferrableNameSuggestionProvider)provider).shouldCheckOthers()) {
        break;
      }
    }
  }
  final LookupElement[] lookupElements = new LookupElement[names.size()];
  final Iterator<String> iterator = names.iterator();
  for (int i = 0; i < lookupElements.length; i++) {
    final String suggestion = iterator.next();
    lookupElements[i] = LookupElementBuilder.create(suggestion).withInsertHandler(new InsertHandler<LookupElement>() {
      @Override
      public void handleInsert(InsertionContext context, LookupElement item) {
        if (shouldSelectAll) return;
        final Editor topLevelEditor = InjectedLanguageUtil.getTopLevelEditor(context.getEditor());
        final TemplateState templateState = TemplateManagerImpl.getTemplateState(topLevelEditor);
        if (templateState != null) {
          final TextRange range = templateState.getCurrentVariableRange();
          if (range != null) {
            topLevelEditor.getDocument().replaceString(range.getStartOffset(), range.getEndOffset(), suggestion);
          }
        }
      }
    });
  }
  return lookupElements;
}
 

@Nullable
private LookupElement[] createLookupItems(String name, Editor editor, PsiNamedElement psiVariable) {
  TemplateState templateState = TemplateManagerImpl.getTemplateState(editor);
  if (psiVariable != null) {
    final TextResult insertedValue =
      templateState != null ? templateState.getVariableValue(PRIMARY_VARIABLE_NAME) : null;
    if (insertedValue != null) {
      final String text = insertedValue.getText();
      if (!text.isEmpty() && !Comparing.strEqual(text, name)) {
        final LinkedHashSet<String> names = new LinkedHashSet<String>();
        names.add(text);
        for (NameSuggestionProvider provider : Extensions.getExtensions(NameSuggestionProvider.EP_NAME)) {
          final SuggestedNameInfo suggestedNameInfo = provider.getSuggestedNames(psiVariable, psiVariable, names);
          if (suggestedNameInfo != null &&
              provider instanceof PreferrableNameSuggestionProvider &&
              !((PreferrableNameSuggestionProvider)provider).shouldCheckOthers()) {
            break;
          }
        }
        final LookupElement[] items = new LookupElement[names.size()];
        final Iterator<String> iterator = names.iterator();
        for (int i = 0; i < items.length; i++) {
          items[i] = LookupElementBuilder.create(iterator.next());
        }
        return items;
      }
    }
  }
  return myLookupItems;
}
 

@javax.annotation.Nullable
SuggestedNameInfo getSuggestedNames(PsiElement element, @Nullable PsiElement nameSuggestionContext, Set<String> result);