@Override
	public FieldLocation getFieldLocation(ListingField bf, BigInteger index, int fieldNum,
			ProgramLocation programLoc) {

		if (!(programLoc instanceof MnemonicFieldLocation)) {
			return null;
		}
		if (!hasSamePath(bf, programLoc)) {
			return null;
		}
		MnemonicFieldLocation loc = (MnemonicFieldLocation) programLoc;
		return new FieldLocation(index, fieldNum, 0, loc.getCharOffset());
	}
Returns the FactoryField for the given object at index index.
@param varWidth the amount of variable width spacing for any fields
before this one.
@param proxy the object whose properties should be displayed.
Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/field/MnemonicFieldFactory.java