Module 968441

function(e,t,n){"use strict";n.d(t,{r:()=>r});var i=n(390225);class r{stores;changeCallback;storeVersionHandled;constructor(e,t){this.stores=e,this.changeCallback=t}attach(e){let{stores:t}=this;t.forEach((t,n)=>{if(null==t)throw Error(`${e} tried to load a non-existent store. Either it isn't defined or there is a circular dependency. Loaded ${n} stores before error.`);t.addReactChangeListener(this.handleStoreChange)})}handleStoreChange=()=>{let e=i.A.getChangeSentinel();this.storeVersionHandled!==e&&(this.changeCallback(),this.storeVersionHandled=e)};detach(){let{stores:e}=this;e.forEach(e=>e.removeReactChangeListener(this.handleStoreChange))}}}