@Contract(pure=true)
  public @NotNull LookupElementBuilder withStrikeoutness(boolean strikeout) {
    final LookupElementPresentation presentation = copyPresentation();
    presentation.setStrikeout(strikeout);
    return cloneWithUserData(myLookupString, myObject, myInsertHandler, null, myExpensiveRenderer, presentation, myPsiElement,
                             myAllLookupStrings, myCaseSensitive);
  }
@Contract(pure=true)
  public @NotNull LookupElementBuilder withStrikeoutness(boolean strikeout)