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- Smalltalk createPackage: 'Helios-Exceptions'!
- Error subclass: #HLError
- slots: {}
- package: 'Helios-Exceptions'!
- !HLError commentStamp!
- I am the abstract superclass of all Helios-specific errors.!
- HLError subclass: #HLChangeForbidden
- slots: {}
- package: 'Helios-Exceptions'!
- !HLChangeForbidden commentStamp!
- I get signaled when a (often user) requested change is forbidden. A confirmation message can then be displayed to the user.
- See `HLModel >> withChangesDo:`.!
- HLError subclass: #HLListItemNotFound
- slots: {}
- package: 'Helios-Exceptions'!
- !HLListItemNotFound commentStamp!
- I get signaled by a `HLListWidget` when a non-existing item in the list is activated.!
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