rotateZ method
Implementation
DOMMatrix rotateZ(double x) {
// rotate(-90) => rotateZ(-90)
double xRad = x * degrees2Radians;
Matrix4 m = _matrix4.clone()..rotateZ(xRad);
return DOMMatrix.fromMatrix4(BindingContext(ownerView, ownerView.contextId, allocateNewBindingObject()), m, _is2D);
}