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const ManagedTransientAttribute( {bool availableAsInput: true, bool availableAsOutput: true}) : isAvailableAsInput = availableAsInput, isAvailableAsOutput = availableAsOutput;
const ManagedTransientAttribute( {bool availableAsInput: true, bool availableAsOutput: true}) : isAvailableAsInput = availableAsInput, isAvailableAsOutput = availableAsOutput;