src/Assetic/WatchingDumper.php
public function watch(OutputInterface $output = null) {
        $this->watching = true;
        $this->commandOutput = $output;
    }
public function watch(OutputInterface $output = null) {
        $this->watching = true;
        $this->commandOutput = $output;
    }
Start watch mode for command assetic:watch.
@param OutputInterface $output