Function isResponseMessage

jsonrpc/src/messages.ts:374–377

(message: Message | undefined)

 * Tests if the given message is a response message
 */
export function isResponseMessage(message: Message | undefined): message is ResponseMessage {
	let candidate = <ResponseMessage>message;
	return candidate && (candidate.result !== void 0 || !!candidate.error) && (is.string(candidate.id) || is.number(candidate.id) || candidate.id === null);
}