Class of all classes in TclOO. All classes are instances of this class (which is consequently an instance of itself!)
‣ oo::object ‣ oo::class
http://www.tcl.tk/man/tcl8.6/TclCmd/class.htm
AMG: Is there a compelling reason why [oo::class new] is hidden?
See also: Semantics of the oo::class command