API Reference > geometry-core > CartesianGeometry > XYZ > isXAndY isXAndY MethodStatic Type guard for XAndY. isXAndY(arg: any): arg is Readonly<WritableXAndY> note this will return true for an XYAndZ. If you wish to distinguish between the two, call isXYAndZ first. Parameter Type Description arg any Returns - arg is Readonly<WritableXAndY> Defined in geometry3d/Point3dVector3d.ts Line 44 Last Updated: 12 June, 2024