roll property
getter/setter pair
Roll (degree). Rotation about the longitudal axis or the angle between
the vertical plane and the plane perpendicular to the ground. If
available, the value is guaranteed to be in the range [-180,180];
positive value means that the vertical plane is tilted to right, negative
value means that the vertical plane is tilted to left, and zero means
that the planes are parallel. If not available, the value is null.
Implementation
double? roll;