[Pharo-dev] adding custom tabs to bottom of gtDebugger

With... Error subclass: #OwnedLockBadRelease instanceVariableNames: 'lockOwner perpetrator' classVariableNames: '' package: 'Kernel-Processes' In playground when I do... | error | (error := OwnedLockBadRelease new) signal then in the debugger select the 'error' tempvar, the [Raw] tab is too busy, so I'd like a custom [Error] tab showing only my two instance variables. I've managed to get a tab to show up by implementing... OwnedLockBadRelease>>gtDebuggerEvaluatorIn: composite super gtDebuggerEvaluatorIn: composite. (GTObjectVariablesBrowser new evaluatorIn: composite) title: 'Error Tab To Do' but I can't find how to add variables. Tips please? cheers -ben