set isEditing(value) {
    this.#isEditing = value;
    if (!this.parent) {
      return;
    }
    if (value) {
      this.parent.setSelected(this);
      this.parent.setActiveEditor(this);
    } else {
      this.parent.setActiveEditor(null);
    }
  }
When set to true, it means that this editor is currently edited.
@param {boolean} value