code: function proxyObjErrors (proxyObj) {
    if (!proxyObj) { return '`proxyObj` not defined'; }
  
    let errors   = '';
    let expected = ['req', 'req', 'reqOpts', 'options'];
  
    _.each(expected, function (expect, index) {
      if (!proxyObj[expect]) {
        errors += (index ? ', ' : '') + 'Missing property: `' + expect + '`';
      }
    });
  
    return errors ? 'Errors found in `proxyObj`: [' + errors + ']' : false;
  }
docs: //////////////////////////////////////////////////////////  Helpers  //////////////////////////////////////////////////////////