Function joint_damping 

pub fn joint_damping<T: Component + EntityConstraint<2>>(
    solver_bodies: ResMut<'_, SolverBodies>,
    index_query: Query<'_, '_, &SolverBodyIndex>,
    joints: Query<'_, '_, (&T, &JointDamping)>,
    time: Res<'_, Time>,
)

Applies velocity corrections caused by joint damping.