LongConverter implements PropertyConverter<Long> { @Override public int hashCode(){ return getClass().hashCode(); }  @Override Long convert(String value, ConversionContext ctx); @Override boolean equals(Object o); @Override int hashCode();  }
@Test public void testHashCode() { LongConverter instance = new LongConverter(); assertThat(instance.hashCode()).isEqualTo(LongConverter.class.hashCode()); }