Missing getters on Metal

examples.js

class DropArea extends JSXComponent {

  render() {
    const validEntries = this.entries.filter(entry => entry.valid);

    if (validEntries) return (
      <ul>
        { entries.map(
          ({title}) =>
            <li>{ title }</li>
          )
        }
      </ul>
    )
  }

}