Add daemon to SolverProperties in OptaPlanner Spring Boot extension

I'm injecting a SolverFactory and doing all of the solver configuration with a combination of XML and application.properties so I'd like to be able to set daemon mode the same way:

optaplanner.solver-config-xml=org/optaweb/vehiclerouting/solver/vehicleRoutingSolverConfig.xml
optaplanner.solver.termination.spent-limit=1m
optaplanner.solver.daemon=true

Yes, I could set it in solverConfig.xml.
Yes, I can inject a SolverConfig instead of SolverFactory, change the config and the create factory from it.

Is daemon mode something that shouldn't be possible to change through properties?