| ⇢ | A | IsEmpty added | |
| ⇢ | A | E4xx_DataCannotBeEmpty added | |
| ⇢ | A | RequireNotEmpty added |
| ⇢ | A | RequireNotEmpty::check() added | |
| ⇢ | A | IsEmpty::check() added | |
| ⇢ | A | IsEmpty::nothingMatchesTheInputType() added | |
| ⇢ | A | IsEmpty::checkArray() added | |
| ⇢ | A | IsEmpty::checkString() added | |
| ⇢ | A | IsEmpty::checkTraversable() added | |
| ⇢ | A | E4xx_DataCannotBeEmpty::__construct() added | |
| ⇢ | A | IsEmpty::__invoke() added | |
| ⇢ | A | IsEmpty::checkNull() added | |
| ⇢ | A | IsEmpty::askObject() added | |
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