if (opcode == Constants.GETFIELD || opcode == Constants.PUTFIELD)
switch (opcode) { case Constants.GETFIELD:
        public void visitFieldInsn(int opcode, String owner, String name, String desc)        {            if (checkName(owner) || checkDesc(desc)) {                // System.err.println("visitFieldInsn " + owner + ", " + desc);                if (opcode == Constants.GETFIELD || opcode == Constants.PUTFIELD)                    cv.visitInsn(Constants.POP);                replace(cv, desc);            } else {                cv.visitFieldInsn(opcode, owner, name, desc);            }        }