id: array-callback-return
valid:
  - "arr.map(x => { return x + 1 })"
  - "arr.map(x => x + 1)"
  - "arr.forEach(x => console.log(x))"
  - "arr.reduce((acc, x) => { return acc + x })"
invalid:
  - "arr.map(x => { x + 1 })"
  - "arr.filter(function (x) { console.log(x) })"
  - "Array.from(set, x => { x + 1 })"