Christoph Thiede uploaded a new version of System to project The Inbox:
http://source.squeak.org/inbox/System-ct.1131.mcz

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

Name: System-ct.1131
Author: ct
Time: 13 January 2020, 12:21:05.96857 pm
UUID: b10f8320-ffea-024e-9696-4fdc0e642415
Ancestors: System-cmm.1129

Adds support for extension methods to SystemNavigation

=============== Diff against System-cmm.1129 ===============

Item was added:
+ ----- Method: SystemNavigation>>allExtensionsOf: (in category 'query') -----
+ allExtensionsOf: aPackage
+ 
+ 	^ aPackage extensionMethods!

Item was added:
+ ----- Method: SystemNavigation>>browseAllExtensionsOf: (in category 'browse') -----
+ browseAllExtensionsOf: aPackage
+ 	"self default browseAllExtensionsOf: SystemNavigation package"
+ 
+ 	^ self
+ 			browseMessageList: [self allExtensionsOf: aPackage]
+ 			name: ('Extensions of package {1}' translated format: {aPackage name})!