Function requiredContext

packages/react-reconciler/src/ReactFiberHostContext.js:36–46

(c: Value | null)

  createCursor(null);

function requiredContext<Value>(c: Value | null): Value {
  if (__DEV__) {
    if (c === null) {
      console.error(
        'Expected host context to exist. This error is likely caused by a bug ' +
          'in React. Please file an issue.',
      );
    }
  }
  return (c: any);
}

function getCurrentRootHostContainer(): null | Container {
  return rootInstanceStackCursor.current;