A new version of System was added to project The Inbox:
http://source.squeak.org/inbox/System-jr.948.mcz

==================== Summary ====================

Name: System-jr.948
Author: jr
Time: 5 May 2017, 12:08:58.857884 am
UUID: 4a19b143-6a23-b549-ab15-0d548da859f4
Ancestors: System-ul.947

incorporate behaviors from other environments in allBehaviorsDo:

This enables senders/implementors and method searches across environments.

=============== Diff against System-ul.947 ===============

Item was changed:
  ----- Method: SystemNavigation>>allBehaviorsDo: (in category 'query') -----
  allBehaviorsDo: aBlock 
  	"Evaluate the argument, aBlock, for each kind of Behavior in the system 
  	(that is, Object and its subclasses and Traits).
  	ar 7/15/1999: The code below will not enumerate any obsolete or anonymous
  	behaviors for which the following should be executed:
  
  		Smalltalk allObjectsDo:[:obj| obj isBehavior ifTrue:[aBlock value: obj]].
  
  	but what follows is way faster than enumerating all objects."
  
+ 	Environment allInstancesDo: [:environment |
+ 		environment allClassesAndTraitsDo: [ :class |
+ 			aBlock value: class.
+ 			class isTrait ifFalse: [ "class of a Trait is Trait, there are no MetaTraits"
+ 				aBlock value: class class ] ] ]!
- 	self environment allClassesAndTraitsDo: [ :class |
- 		aBlock value: class.
- 		class isTrait ifFalse: [ "class of a Trait is Trait, there are no MetaTraits"
- 			aBlock value: class class ] ]!