Hi I'm the only one to experience a isVariable DNU when typing a class name and pressing command B in playground? Example PointCURSORHERE [node isVariable] whileFalse: [ (node := node parent) ifNil: fallbackBlock ]. in findClassFromAST "Try to make a class name out of the current text selection" | node fallbackBlock className | "Preserve original behavior - although could consider building AST from selection" self hasSelection ifTrue: [ ^(self selection string copyWithoutAll: CharacterSet crlf) trimBoth ]. fallbackBlock := [^nil]. node := self bestNodeInTextAreaOnError: fallbackBlock. [node isVariable] whileFalse: [ (node := node parent) ifNil: fallbackBlock ]. className := node name. [ className first isUppercase ] whileFalse: [ (className := className allButFirst) ifEmpty: fallbackBlock ]. ^className