Function nextHook

packages/react-debug-tools/src/ReactDebugHooks.js:153–159

()

let currentThenableState: null | Array<Thenable<mixed>> = null;

function nextHook(): null | Hook {
  const hook = currentHook;
  if (hook !== null) {
    currentHook = hook.next;
  }
  return hook;
}

function readContext<T>(context: ReactContext<T>): T {
  if (currentFiber === null) {