Function isFunctionClassComponent

packages/react-reconciler/src/ReactFiber.js:318–322

(
  type: (...args: Array<any>) => mixed,
)

}

export function isFunctionClassComponent(
  type: (...args: Array<any>) => mixed,
): boolean {
  return shouldConstruct(type);
}

// This is used to create an alternate fiber to do work on.
export function createWorkInProgress(current: Fiber, pendingProps: any): Fiber {