NewLogicalClusterIndex creates an index that contains all the keys of the synced and upsynced resources, indexed by logical cluster name.

NewShardManager returns a [ShardManager] that can manage the addition or removal of shard-specific upstream virtual workspace URLs, based on a SyncTarget resource passed to the updateShards() method.

NewSyncTargetController returns a controller that watches the [workloadv1alpha1.SyncTarget] associated to this syncer.

NewSyncTargetGVRSource returns an [informer.GVRSource] that can update its list of GVRs based on a SyncTarget resource passed to the updateGVRs() method.

ShardAccess contains clustered dynamic clients, as well as cluster-aware informer factories for both the Syncer and Upsyncer virtual workspaces associated to a Shard.

GetShardAccessFunc is the type of a function that provide a [ShardAccess] from a logical cluster name.