Request Bank.open(LocatableEntity)

At the moment there are two methods to open a bank, Bank.open() and Bank.open(LocatableEntity, String). I would highly suggest adding an overload Bank.open(LocatableEntity), for the case the the bot has already queried an entity but does not know the interaction string.
Judging from your implementation of Bank.open() it should not be a circumstance to make it happen.

@Cloud