### Question:
MappingInformation implements Comparable<MappingInformation> { @Override public String toString() { return String.join(", ", queueNames); }  @Override String toString(); @Override int compareTo(MappingInformation o);  }### Answer:
@Test public void builderToString() { MappingInformation.MappingInformationBuilder builder = MappingInformation.builder().active(true); System.out.println(builder.toString()); }