while (!vstack.isEmpty()) { Item v = vstack.pop(); if (v.isStack()) {  if (VirtualStack.checkOperandStack) { vstack.operandStack.pop(v); } os.writeLEA(helper.SP, helper.SP, v.getCategory() * helper.SLOTSIZE); } v.release(eContext); }
	public final void visit_return() {		stackFrame.emitReturn();		assertCondition(vstack.isEmpty(), "vstack should be empty; it is ",				vstack);	}