docs: function watchFile(file, callback) {
  	let absolutePath = File.find(file).path();
  	let watcher = chokidar
  		.watch(
  			absolutePath,
  			{
  				persistent: true
  			}
  		)
  		.on(
  			'change',
  			function () {
  				if (typeof callback === 'function') {
  					callback(file);
  				}
  				watcher.unwatch(absolutePath);
  				watchFile(file, callback);
  			}
  		)
  	;
  }