inline read onlyBOTTOM_TO_TOP:TextDirection = 7
inline read onlyINVALID:TextDirection = 0
inline read onlyLEFT_TO_RIGHT:TextDirection = 4
inline read onlyRIGHT_TO_LEFT:TextDirection = 5
inline read onlyTOP_TO_BOTTOM:TextDirection = 6
read onlybackward:Bool
read onlyforward:Bool
read onlyhorizontal:Bool
read onlyvertical:Bool
inline reverse ():Void
inline toString ():String