This member is added by an implicit conversion from EntityTypeKey[T] to
any2stringadd[EntityTypeKey[T]] performed by method any2stringadd in scala.Predef.
This member is added by an implicit conversion from EntityTypeKey[T] to
StringFormat[EntityTypeKey[T]] performed by method StringFormat in scala.Predef.
The key of an entity type, the
name
must be unique.Not for user extension.