import * as Vue from 'vue' ; import { ComponentOptions } from 'vue' ; import { Dictionary } from '../declarations' ; import propertyMixin from './property' ; import { assert } from '../utils' ; export default { mixins : [ propertyMixin ] , canvas : { render ( ) { assert ( false , 'must be implemented canvas render function' ) ; } } , render ( h ) { return h ( ) ; } } as ComponentOptions < Vue > ;