can not instrument replace static method or final method?

[punkisnotdead3]

like this:

klass.declaredMethods.forEach { ctMethod-> val ctMethodName = ctMethod.name ctMethod.instrument(object : ExprEditor() { override fun edit(m: MethodCall?) { m?.let { methodCall -> when (methodCall.className) { "android.telephony.TelephonyManager" -> { when (methodCall.methodName) { "getDeviceId" -> { m.replace("$_ = FakeTelephonyManager.getFakeDeviceId();") } else -> {

                                }
                            }
                        }  
                    }
                }
            }
        })
    }

if method is normal，this replace success but if method is static or final， replace is invalid

why？