Protected ReadonlybankProtected ReadonlycacheProtected ReadonlydbStaticinstanceBusts one customer's cached searches by their membership tag, and the
memo's folded get keys, the one bust a null client honours. Called by
the writers after create and delete: DepositBankMemoService and
DepositBankMemoAdminService.delete.
Protectedresolve
The process default: built from each dependency's own
instance().