Q_PROPERTY(boolcontainsItemsREADcontainsItemsNOTIFYcontainsItemsChanged)///< true: Elemement is non-empty
Q_PROPERTY(boolsyncInProgressREADsyncInProgressNOTIFYsyncInProgressChanged)///< true: information is currently being saved/sent, false: no active save/send in progress
Q_PROPERTY(booldirtyREADdirtyWRITEsetDirtyNOTIFYdirtyChanged)///< true: unsaved/sent changes are present, false: no changes since last save/send
Q_PROPERTY(QStringfileExtensionREADfileExtensionCONSTANT)///< Returns the file extention for plan element file type.
Q_PROPERTY(boolcontainsItemsREADcontainsItemsNOTIFYcontainsItemsChanged)///< true: Elemement is non-empty
Q_PROPERTY(boolsyncInProgressREADsyncInProgressNOTIFYsyncInProgressChanged)///< true: information is currently being saved/sent, false: no active save/send in progress
Q_PROPERTY(booldirtyREADdirtyWRITEsetDirtyNOTIFYdirtyChanged)///< true: unsaved/sent changes are present, false: no changes since last save/send