23      * @param callable $cb
27     function setTimeout(callable $cb, $timeout) {  argument
33             $this->timers[] = [$triggerTime, $cb];
48                     [[$triggerTime, $cb]]
52                 array_unshift($this->timers, [$triggerTime, $cb]);
67      * @param callable $cb
71     function setInterval(callable $cb, $timeout) {  argument
76         $f = function() use ($cb, &$f, $timeout, &$keepGoing) {
78                 $cb();
109      * @param callable $cb
112     function nextTick(callable $cb) {  argument
114         $this->nextTick[] = $cb;
129      * @param callable $cb
132     function addReadStream($stream, callable $cb) {  argument
135         $this->readCallbacks[(int)$stream] = $cb;
149      * @param callable $cb
152     function addWriteStream($stream, callable $cb) {  argument
155         $this->writeCallbacks[(int)$stream] = $cb;
273         foreach ($nextTick as $cb) {
274             $cb();