GetOptionKit\Option::isa PHP Method

    public function isa($type, $option = null)
    {
        // "bool" was kept for backward compatibility
        if ($type === 'bool') {
            $type = 'boolean';
        }
        $this->isa = $type;
        $this->isaOption = $option;
        return $this;
    }

 /**
  * @expectedException Exception
  */
 public function testInvalidTypeClass()
 {
     $opt = new Option('scope');
     $opt->isa('SomethingElse');
     $class = $opt->getTypeClass();
 }