text: /* eslint-disable no-unused-vars */
  const {
    AbstractChannel,
    Capability,
    Channel,
    FineChannel,
    Fixture,
    Manufacturer,
    Matrix,
    MatrixChannel,
    MatrixChannelReference,
    Meta,
    Mode,
    NullChannel,
    Physical,
    Range,
    SwitchingChannel,
    TemplateChannel
  } = require(`../model.js`);
  /* eslint-enable no-unused-vars */
  
  module.exports = [{
    name: `\`null\` channels`,
    description: `Channel list of a mode contains null, so it has an unused channel`,
  
    /**
     * @param {!Fixture} fixture The Fixture instance
     * @returns {!boolean} true if the fixture uses the feature
     */
    hasFeature: fixture => fixture.nullChannels.length > 0
  }];
  