return reference.equals(other.reference) && field.equals(other.field);
return  (reference == other.reference || (reference != null && other.reference != null && reference.equals(other.reference))) && field.equals(other.field);
	public boolean equals(Object o) {		if (this.getClass() != o.getClass())			return false;		AvailableLoad other = (AvailableLoad) o;		return reference.equals(other.reference) && field.equals(other.field);	}