offline: no internet (but isOnline: true) produces mutation missing

[bazuka5801]

Example: connect to vpn on iOS device, but turn on AirPlane mode.
It's hard to setOnline truly because all the libraries say we're connected, and hard to detect truly network state.
I want to handle errors in all mutations, and if there is a network error, we pause the mutation and set SetOnline(false).
How can I pause the mutation so I don't lose it when there is an error?