Function route_object_callback 

pub fn route_object_callback(
    value_json: &str,
    handler: &Arc<Mutex<Option<ObjectResponseHandler>>>,
) -> Option<(String, Value)>

Route an object-callback request frame to the registered closure.

Object-callback frames are org.mockserver.model.HttpRequest messages that carry a WebSocketCorrelationId but no X-MockServer-BreakpointId header (that header marks a paused-breakpoint request, handled elsewhere).

Returns None when the frame is a breakpoint request (has a breakpoint id) or when no object handler is registered — in both cases the caller falls through to the breakpoint request path. On a match, invokes the closure (auto-continuing with a passthrough response on panic), echoes the WebSocketCorrelationId onto the reply, and returns ("org.mockserver.model.HttpResponse", response_json).