CPAlgorithms: add protection to containersOnlyForMC in Output config
Add a protection after a concern raised by @dbiswas that writing e.g.
Output:
...
containers:
mu_: 'OutMuons'
el_: 'OutElectrons'
jet_: 'OutJets'
met_: 'AnaMET'
'': 'EventInfo'
containersOnlyForMC:
'': 'TopPartonHistoryTtbar'
would silently discard the EventInfo
variables.
This MR will force the user to specify unique keys for containersOnlyForMC
.