Represents a message sent in an event stream https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#Event_stream_format
The event data
A string identifying the type of event described.
The event ID to set the EventSource object's last event ID value.
Optional
The reconnection interval (in milliseconds) to wait before retrying the connection
Represents a message sent in an event stream https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#Event_stream_format