es6-obj-class-conversion-initial-obj.js

export default {
  configSettingExists( config, key ) {
    // Search the config object for the key value
    let found = Object.keys( config ).indexOf( key )
    return found;
  },
  
  indexArrayBy(arr, attrName, group=false) {
    // ...
  },
  
  initConfig() {
    // ... load a json file via AJAX, filesystem, etc. ...
    return config
  },

  printConfigFormatInstructions() {
     console.log('Your config file must be in json format, and contain the following keys: foo, bar, baz.');
  },
  
  toRGBA(hex, opacity) {
    // ...
  },
   
  // ...
}