@Override
    protected void addCompletions(@NotNull CompletionParameters parameters,
                                  @NotNull ProcessingContext context,
                                  @NotNull CompletionResultSet result) {
      final PsiElement position = parameters.getPosition();
      if (isAfterSeparator(position) && position.textMatches(CompletionUtilCore.DUMMY_IDENTIFIER_TRIMMED)) {
        result.addElement(LookupElementBuilder.create("unset").withItemTextForeground(JBColor.GRAY));
      }
    }
@Override
    protected void addCompletions(@NotNull CompletionParameters parameters,
                                  @NotNull ProcessingContext context,
                                  @NotNull CompletionResultSet result)