index.js
function arrays(arr, i) {
  var values = filterType(arr, 'array');
  return i ? values[i] : values;
}
function arrays(arr, i) {
  var values = filterType(arr, 'array');
  return i ? values[i] : values;
}
function arrays ( arr , i ) { var values = filterType ( arr , 'array' ) ; return i ? values [ i ] : values ; }
Filter `array`, returning only the arrays.

```js
var arr = ['a', ['aaa'], 1, 'b', ['bbb'], 2, {c: 'd'}, 'c'];

utils.objects(arr);
//=> [['aaa'], ['bbb']]
```

@param  {Array} `array`
@param  {Array} `index` Optionally specify the index of the array to return, otherwise all arrays are returned.
@return {Array} Array of arrays or empty array.
@api public
Filter array returning only the arrays .