gistfile1.txt

handleEvent on the base calss

  console.log(this[gesEvent.eventName]);
  console.log(this[gesEvent.eventName](gesEvent.data, gesEvent.metadata.continuationId));
  
result 
  [Function: hireTrainer]
  [TypeError: undefined is not a function]


ths[gesEvent.eventName] is on the child class
  
in calling calss I loop through a collection of classes that all inherit from baseclass
   .forEach(m=> {
        m.handleEvent(vent);
    });