frontend/lib/generate-image-markup.js
function mapValues(obj, iteratee) {
  const result = {}
  for (const k in obj) {
    result[k] = iteratee(obj[k])
  }
  return result
}
function mapValues(obj, iteratee) {
  const result = {}
  for (const k in obj) {
    result[k] = iteratee(obj[k])
  }
  return result
}
function mapValues ( obj , iteratee ) { const result = { } for ( const k in obj ) { result [ k ] = iteratee ( obj [ k ] ) } return result }
lodash.mapvalues is huge!
lodash . mapvalues is huge!