def resolve_service(parent, args, context, info):
    # For debugging purposes
    print("Resolver resolve_service called")
    
    # For now, return a placeholder SDL.
    sdl = "type Query { _service: _Service } type _Service { sdl: String }"
    
    result = {"sdl": sdl}
    print(f"Returning from resolve_service: {result}")
    return result