@Nullable
  public FindUsagesHandler getFindUsagesHandler(@NotNull PsiElement element, boolean forHighlightUsages) {
    return getFindUsagesHandler(element, forHighlightUsages ? OperationMode.HIGHLIGHT_USAGES : OperationMode.DEFAULT);
  }
@Nullable
  public FindUsagesHandler getFindUsagesHandler(@NotNull PsiElement element, boolean forHighlightUsages)