code: function isMasterExpired(instance) {
          const masterStatus = instance.masterStatus || {};
          let isExpired = false;
          let disconnectedMs;
  
          if (masterStatus.status !== CloudProvider.STATUS_OK) {
              disconnectedMs = new Date() - new Date(masterStatus.lastStatusChange);
              logger.silly('master has been disconnected for', disconnectedMs.toString(), 'ms');
              if (disconnectedMs > MAX_DISCONNECTED_MS) {
                  logger.info('master has been disconnected for too long (', disconnectedMs.toString(), 'ms )');
                  isExpired = true;
              }
          }
          return isExpired;
      }
docs: /*
  Determines if the master status has been bad for more than a certain
  amount of time.
  
  @param {Object} instance - instance as returned by getInstances
  
  @returns {Boolean} Whether or not the master status has been bad for too long