@Override
	public ProgramLocation getProgramLocation(int row, int col, ListingField bf) {
		Object obj = bf.getProxy().getObject();
		if (!(obj instanceof Instruction) || row < 0 || col < 0) {
			return null;
		}

		Instruction instr = (Instruction) obj;

		return new StackDepthFieldLocation(instr.getProgram(), instr.getMinAddress(), col);
	}
@see ghidra.app.util.viewer.field.FieldFactory#getProgramLocation(int, int, ghidra.app.util.viewer.field.ListingField)
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/function/StackDepthFieldFactory.java