Command used in [TclOO] and [XOTcl] to call the ''next'' method in a method call chain. Syntax is different between two extensions (mainly because [TclOO] requires Tcl 8.5) and semantics is slightly different ([TclOO]'s '''next''' effectively does an [uplevel] inside itself).

**Syntax**
In TclOO/Tcl 8.6:
    :   '''next''' ?''arg ...''?
    :   '''nextto''' ''class'' ?''arg ...''?

The '''nextto''' command takes an additional ''class'' argument that specifies which implementation on the call chain to go to.

<<categories>> Command | Object Orientation