@Contract(pure=true)
  public @NotNull LookupElementBuilder withBaseLookupString(@NotNull String lookupString) {
    return cloneWithUserData(lookupString, myObject, myInsertHandler, myRenderer, myExpensiveRenderer, myHardcodedPresentation,
                             myPsiElement, myAllLookupStrings, myCaseSensitive);
  }
@Contract(pure=true)
  public @NotNull LookupElementBuilder withBaseLookupString(@NotNull String lookupString)