ApplyOptions constructs a new `ConstructionOptions` value from a sensible default and then applies the supplied options to it.

MakePrefix returns function that appends unique prefix to any key, used to make test suite concurrent-run proof.

RequireItems asserts that the supplied `actual` items collection matches the `expected` collection, in size, ordering and the key/value pairs of each entry.

RunBackendComplianceSuite runs the entire backend compliance suite, creating a collection of named subtests under the context provided by `t`.

RunBackendComplianceSuiteWithAtomicWriteShim runs the old backend compliance suite against the provided backend with a shim that converts all calls to single-write methods (all write methods but DeleteRange) into calls to AtomicWrite.

WithConcurrentBackend asks the constructor to create a.

WithMirrorMode asks the constructor to create a Backend in "mirror mode".

AtomicWriteShim reimplements all single-write backend methods as calls to AtomicWrite.

BlockingFakeClock simulates a fake clock by sleeping instead of advancing an actual fake clock.

ConstructionOption describes a named-parameter setting function for configuring a ConstructionOptions instance.

Constructor describes a function for constructing new instances of a backend, with various options as required by a given test.