DefaultNewClient creates the default caching client.

FieldIndexName constructs the name of the index over the given field, for use with an indexer.

KeyToNamespacedKey prefixes the given index key with a namespace for use in field selector indexes.

NewDelegatingClient creates a new delegating client.

RequiresExactMatch checks if the given field selector is of the form `k=v` or `k==v`.

NewDelegatingClientInput encapsulates the input parameters to create a new delegating client.