Objects.equal() and hashCode()

gistfile1.java

@Override
	public int hashCode() {
		return Objects.hashCode(describe(), markerType());
	}

	@Override
	public boolean equals(Object obj) {
		if (obj == this) {
			return true;
		}
		if (obj instanceof ModelDifference) {
			ModelDifference that = (ModelDifference) obj;
			return Objects.equal(this.describe(), that.describe())
					&& Objects.equal(this.markerType(), that.markerType());
		}
		return false;
	}