Function fdf_env_register_resume_requester 

pub unsafe extern "C" fn fdf_env_register_resume_requester(
    driver: *const c_void,
    requester: *mut fdf_env_resume_requester_t,
)

Registers for callbacks for when the driver needs to be resumed. The callback being triggered should eventually result in |fdf_env_driver_resume| being called.