formatRetryEvent

Frame a standalone Server-Sent Events retry: event carrying the reconnection time in milliseconds (per the SSE standard's retry field: https://html.spec.whatwg.org/multipage/server-sent-events.html). The server SHOULD send this before closing a connection it is not terminating; the client MUST then wait the given number of milliseconds before reconnecting (basic/transports §Sending Messages item 6). A bare retry: event carries no data: line, so it updates the client's reconnection time without dispatching any JSON-RPC payload.

@safe
string
formatRetryEvent
(
uint ms
)