public int getOffset(int i) {
		if (i < 0)
			return point.getOffset();
		ConstructState op = point.getSubState(i);
		return op.getOffset() + op.getLength();
	}
Get the offset into the instruction for the current node (i=-1) or one of the current node's children
@param i selects the desired child of the current node
@return the offset (in bytes) for the selected node
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/ParserWalker.java