private static @NotNull DefaultGradleSourceSetModel readSourceSetModel(
    @NotNull IonReader reader,
    @NotNull ReadContext context
  ) {
    assertNotNull(reader.next());
    assertFieldName(reader, PROJECT_SOURCE_SET_MODEL_FIELD);
    return GradleSourceSetSerialisationService.readSourceSetModel(reader, context.sourceSetModel);
  }
private static @NotNull DefaultGradleSourceSetModel readSourceSetModel(
    @NotNull IonReader reader,
    @NotNull ReadContext context
  )