@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (!super.equals(obj)) {
			return false;
		}
		if (getClass() != obj.getClass()) {
			return false;
		}
		OperandFieldLocation other = (OperandFieldLocation) obj;
		if (!Objects.equals(rep, other.rep)) {
			return false;
		}
		if (subOpIndex != other.subOpIndex) {
			return false;
		}
		if (!Objects.equals(variableOffset, other.variableOffset)) {
			return false;
		}
		return true;
	}
Returns the sub operand index at this location.
<p>
This index can be used on the instruction.getOpObjects() to find the actual object (Address,
Register, Scalar) the cursor is over.
@return 0-n if over a valid OpObject, -1 otherwise
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/util/OperandFieldLocation.java