public function removeAt($i)
    {
        $field = $this->getNameAt($i);
        $this->removeKey($field);
        return $this;
    }
public function removeAt($i)
    {
        $field = $this->getNameAt($i);
        $this->removeKey($field);
        return $this;
    }
public function removeAt ( $ i ) { $ field = $ this -> getNameAt ( $ i ) ; $ this -> removeKey ( $ field ) ; return $ this ; }
Remove field by index
@param int $i
@return \PerrysLambda\ArrayList
Remove field by index