Function CFReadStreamUnscheduleFromRunLoop 

pub extern "C-unwind" fn CFReadStreamUnscheduleFromRunLoop(
    stream: &CFReadStream,
    run_loop: Option<&CFRunLoop>,
    run_loop_mode: Option<&CFRunLoopMode>,
)

👎Deprecated: renamed to CFReadStream::unschedule_from_run_loop

Available on crate features CFRunLoop and CFStream only.