@NotNull
  @Override
  public List<Substring> getKeywordArgumentSubstrings() {
    final List<Substring> result = new ArrayList<>();
    for (SectionField field : getKeywordArgumentFields()) {
      ContainerUtil.addAllNotNull(field.getNamesAsSubstrings());
    }
    return result;
  }
@NotNull
  @Override
  public List<Substring> getKeywordArgumentSubstrings()