Function getID

packages/react-devtools-shared/src/backend/legacy/renderer.js:192–202

(internalInstance: InternalInstance)

  }

  function getID(internalInstance: InternalInstance): number {
    if (typeof internalInstance !== 'object' || internalInstance === null) {
      throw new Error('Invalid internal instance: ' + internalInstance);
    }
    if (!internalInstanceToIDMap.has(internalInstance)) {
      const id = getUID();
      internalInstanceToIDMap.set(internalInstance, id);
      idToInternalInstanceMap.set(id, internalInstance);
    }
    return ((internalInstanceToIDMap.get(internalInstance): any): number);
  }

  function areEqualArrays(a: Array<any>, b: Array<any>) {
    if (a.length !== b.length) {