itcl::component - define components for extendedclass, widget or widgetadaptor

       The component command is used  inside  an  [incrTcl]  extendedclass/widget/widgetadaptor  definition  to
       define components.

       Explicitly declares a component called comp, and automatically defines the component's instance variable.

       If  the  -inherit  option  is  specified  then  all unknown methods and options will be delegated to this
       component. The name -inherit implies that instances of this new type inherit, in a sense, the methods and
       options of the component. That is, -inherit yes is equivalent to:

              component mycomp
              delegate option * to mycomp
              delegate method * to mycomp

       component, widget, widgetadaptor, extendedclass

itcl                                                   4.0                                      component(3itcl)

       itcl::component - define components for extendedclass, widget or widgetadaptor

       Parts  of  this  description  are  "borrowed"  from  Tcl extension [snit], as the functionality is mostly
       identical.

publiccomponentcomp ?-inherit?
       protectedcomponentcomp ?-inherit?
       privatecomponentcomp ?-inherit?
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       This is new functionality in [incr Tcl] where the API can still change!!