$nestcollection->group()

Groups the elements by a given field or callback function

$nestcollection->group(string|\Closure $field, bool $i = true): Kirby\Toolkit\Collection

Parameters

Name	Type	Default
$field *	`string`\|`Closure`	–
$i	`bool`	`true`

Type	Description
`Exception`	if $field is not a string nor a callback function