Return the rendering contexts currently registered on surface, in render order.
The returned readonly array is the surface's live registry view, not a snapshot:
later registrations and removals are visible through the same reference without
allocating on each query.
Return the rendering contexts currently registered on
surface, in render order.The returned readonly array is the surface's live registry view, not a snapshot: later registrations and removals are visible through the same reference without allocating on each query.