@Override
		public void visitOp(JitOp op) {
			if (!used.add(op)) {
				return;
			}
			JitOpUpwardVisitor.super.visitOp(op);
		}
Construct a collector for the given block

@param block the block whose ops are being examined
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/emu/jit/analysis/JitOpUseModel.java