Reach quiescence on the store.
If the Folks.PersonaStore.prepare method has already been called on the store, this causes the store to signal that it has reached quiescence immediately. If the store has not yet been prepared, this will set a flag to ensure that quiescence is reached as soon as Folks.PersonaStore.prepare is called.
This must be called before the store will reach quiescence.
0.9.7