Here is a growing list of events which are exposed by the elastic.io sailor. Meaning if the component is emitting any of these events they would be recognised and processed accordingly by the platform:

Event Description
data This event is used to emit or return the values from the executions.
error This event is used to emit the error messages which are occurring in the executions.
snapshot Using this event one can emit the Snapshot object.
end This event emits the End execution, indicating that the data processing is complete.
updateKeys This event is used to emit or update the OAuth Keys
httpReply This event emits/sends back the HTTP Reply.