@NotNull
  private static String getSelfParameterName(@NotNull ParametersInfo info) {
    final PyParameter selfParameter = info.getSelfParameter();
    if (selfParameter == null) {
      return PyNames.CANONICAL_SELF;
    }
    return StringUtil.defaultIfEmpty(selfParameter.getName(), PyNames.CANONICAL_SELF);
  }
@NotNull
  private static String getSelfParameterName(@NotNull ParametersInfo info)