feature that will be called on the final instance of this effect after it has been de-instated.
This happens either on a normal return form the code passed to `instate`, on an abort performed on this effect or on an abort performed on an effect instated prior to this effect's instation.
This can be used to perform actions when leaving an effect such a cleanup up resources that were created or opened by operations of this effect.
0.094dev (2025-06-18 15:08:51 GIT hash 89cffc23ae669b0898a5564fefbf793fcb8e5ca7 built by fridi@fzen)
after it has been de-instated.
This happens either on a normal return form the code passed to
`instate`, on an abort performed on this effect or on an abort
performed on an effect instated prior to this effect's instation.
This can be used to perform actions when leaving an effect such
a cleanup up resources that were created or opened by operations
of this effect.