Function createDrainHandler

packages/react-dom/src/server/ReactDOMFizzServerNode.js:49–51

(destination: Destination, request: Request)

ensureCorrectIsomorphicReactVersion();

function createDrainHandler(destination: Destination, request: Request) {
  return () => startFlowing(request, destination);
}

function createCancelHandler(request: Request, reason: string) {
  return () => {