public Varnode findInputVarnode(int sz, Address addr) {
		return vbank.findInput(sz, addr);
	}
return Varnode of given size and starting Address, which is also an input
@param sz -- size of Varnode
@param addr -- starting Address of Varnode
@return -- the Varnode
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/PcodeSyntaxTree.java