text: import {
      observable,
      action,
      computed,
  } from 'mobx';
  
  class EditorStore {
      @observable.ref left;
      @observable.ref right;
      @observable.ref main;
  
      constructor() {
          this.left = null;
          this.right = null;
          this.main = null;
      }
  
      @action
      setLeft(value) {
          this.left = value;
      }
  
      @action
      setRight(value) {
          this.right = value;
      }
  
      @action
      setMain(value) {
          this.main = value;
      }
  }
  
  const editorStore = new EditorStore();
  export default editorStore;
  