case classStringKey(key: String) extends Product with Serializable
Represents an arbitrary string-typed key.
Classes should explicitly convert to this (rather than letting clients use toString
to generate string versions of keys) as a signal that the key format must be stable and
is not simply for debugging convenience.
Represents an arbitrary string-typed key.
Classes should explicitly convert to this (rather than letting clients use
toString
to generate string versions of keys) as a signal that the key format must be stable and is not simply for debugging convenience.See StringKeyFormat for convenient conversion definitions.