oo::define , a built-in Tcl command, defines and changes the definition of existing classes in TclOO.
If given as a sequence of args, the definitionScript is created by making a list of those arguments and evaluating that as if it was given as a definitionScript. Supported definitions for use in the definitionScript are:
my can be used as the command name:
oo::objdefine myobject forward method2 my method1