Function scroll_physics_timer_callback 

pub extern "C" fn scroll_physics_timer_callback(
    data: RefAny,
    timer_info: TimerCallbackInfo,
) -> TimerCallbackReturn

The scroll physics timer callback.

This is a normal timer callback registered with SCROLL_MOMENTUM_TIMER_ID. It consumes pending scroll inputs, applies physics, and pushes ScrollTo changes.

Uses the ScrollPhysics configuration from SystemStyle for friction, velocity thresholds, wheel multiplier, and rubber-banding parameters. Per-node OverflowScrolling and OverscrollBehavior CSS properties are respected to decide whether each node gets rubber-banding.

C API

This function has extern "C" ABI so it can be used as a TimerCallbackType.