index.js
function _start(timer){
  log('start %j', timer.conf);
  timer.state.intervalTimer = setInterval(_onInterval, timer.conf.intervalMs, timer);
  return _ping(timer);
}
function _start(timer){
  log('start %j', timer.conf);
  timer.state.intervalTimer = setInterval(_onInterval, timer.conf.intervalMs, timer);
  return _ping(timer);
}
Private Functions