1.
extensionNSObject{
openfuncperform(_aSelector:Selector, with anArgument:Any?, afterDelay delay:TimeInterval, inModes modes: [RunLoopMode])
openfuncperform(_aSelector:Selector, with anArgument:Any?, afterDelay delay:TimeInterval)
openclassfunccancelPreviousPerformRequests(withTarget aTarget:Any, selector aSelector:Selector, object anArgument:Any?)
openclassfunccancelPreviousPerformRequests(withTarget aTarget:Any)
}