Hello, I'm doing this: ``` import React from "react" import { Model } from 'coloquent' class AppModel extends Model { getJsonApiBaseUrl() { return 'http://mysite.com/api' } } class Bill extends AppModel { jsonApiType = 'bills' } class SandboxPageMainPage extends React.Component { static propTypes = {} static defaultProps = {} state = {} componentDidMount() { const billModel = new Bill() billModel.get() } render() { return ( <div>Coloquent test!</div> ) } } export default SandboxPageMainPage ``` And I get this error: `TypeError: "class constructors must be invoked with 'new'"` Is it normal?