handler method
Implementation
handler(MethodCall call) {
if (call.method == "showMessage") {
onState(StatesPlugPag(Type.message, call.arguments.toString()));
} else if (call.method == "showErrorMessage") {
onState(StatesPlugPag(Type.error, call.arguments.toString()));
} else {
onState(StatesPlugPag(Type.loading, call.arguments.toString()));
}
}