public int getSlot(Address addr, int skip) {
		int res = groupSet[0];
		if (alignment != 0) {
			long diff = addr.getOffset() + skip - addressbase;
			int baseslot = (int) diff / alignment;
			if (isReverseStack()) {
				res += (numslots - 1) - baseslot;
			}
			else {
				res += baseslot;
			}
		}
		else if (skip != 0) {
			res = groupSet[groupSet.length - 1];
		}
		return res;
	}
Assuming the address is contained in this entry and we -skip- to a certain byte
return the slot associated with that byte
@param addr  is the address to check (which MUST be contained)
@param skip  is the number of bytes to skip
@return the slot index
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/lang/ParamEntry.java