public Iterator<VarnodeAST> getVarnodes(AddressSpace spc) {
		return vbank.locRange(spc);
	}
return Iterator to all Varnodes in the indicated AddressSpace
@param spc -- AddressSpace to restrict Iterator to
@return -- Iterator to Varnodes
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/PcodeSyntaxTree.java