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Pickling support for C++ micro simulations does not work #87

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@IshaanDesai

Description

Support for pickling micro simulations as shown in the dummy does not allow for passing the simulation id of the current instance of the simulation to the newly created instance of the simulation. If a micro simulation is pickled (for its transfer between ranks in a global adaptivity scenario), the simulation id that is given to it by the Micro Manager during initialization needs to be defined once more in the new instance. Either the Micro Manager needs to pass it in via the set state functionality, or somehow it needs to be passed internally from the old instance to the new instance. This problem was also observed by @mathiskelm while finalizing the DuMuX micro simulation for the two-scale-heat-conduction tutorial case.

Further investigations are necessary here.

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