private @NotNull LookupElement createReturnKeyword() {
    TailType returnTail = getReturnTail(myPosition);
    LookupElement ret = createKeyword(PsiKeyword.RETURN);
    if (returnTail != TailTypes.noneType()) {
      ret = new OverridableSpace(ret, returnTail);
    }
    return ret;
  }
private @NotNull LookupElement createReturnKeyword()