Evaluated the code snipped an get an exception:
GLMTabulator(Object)>>doesNotUnderstand: #using:
UndefinedObject>>DoIt
Compiler>>evaluate:in:to:notifying:ifFail:logged:
SmalltalkEditor>>evaluateSelectionAndDo: in Block: [rcvr class evaluatorClass new...
BlockClosure>>on:do:
SmalltalkEditor>>evaluateSelectionAndDo:
SmalltalkEditor>>evaluateSelection
PluggableTextMorph>>doIt in Block: [textMorph editor evaluateSelection]
PluggableTextMorph>>handleEdit: in Block: [result := editBlock value]
TextMorphForEditView(TextMorph)>>handleEdit:
PluggableTextMorph>>handleEdit:
PluggableTextMorph>>doIt
Workspace(Object)>>perform:orSendTo:
ToggleMenuItemMorph(MenuItemMorph)>>invokeWithEvent: in Block: [| selArgCount |...
BlockClosure>>ensure:
CursorWithMask(Cursor)>>showWhile:
ToggleMenuItemMorph(MenuItemMorph)>>invokeWithEvent:
ToggleMenuItemMorph(MenuItemMorph)>>mouseUp:
ToggleMenuItemMorph(MenuItemMorph)>>handleMouseUp:
MouseButtonEvent>>sentTo:
ToggleMenuItemMorph(Morph)>>handleEvent:
MorphicEventDispatcher>>dispatchDefault:with:
MorphicEventDispatcher>>dispatchEvent:with:
ToggleMenuItemMorph(Morph)>>processEvent:using:
MorphicEventDispatcher>>dispatchDefault:with:
MorphicEventDispatcher>>dispatchEvent:with:
MenuMorph(Morph)>>processEvent:using:
MenuMorph(Morph)>>processEvent:
MenuMorph>>handleFocusEvent:
HandMorph>>sendFocusEvent:to:clear: in Block: [ActiveHand := self....