HashCodeBuilder, EqualsBuilder ... quem ja viu ? quem usa?

@Override
	public int hashCode() {
		return org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(this); 	
	}
	
	@Override
	public boolean equals(Object obj) {
		return org.apache.commons.lang.builder.EqualsBuilder.reflectionEquals(this, obj);
	}