AddExtraDataCommand::AddExtraDataCommand(CustomTrackView *view, const QString&id, const QString&key, const QString &oldData, const QString &newData, QUndoCommand * parent) :
QUndoCommand(parent),
AddExtraDataCommand::AddExtraDataCommand(CustomTrackView *view, const QString&id, const QString&key, const QString &oldData, const QString &newData, QUndoCommand * parent) :
QUndoCommand(parent),