public function whereId(string $field, $id, string $op = ''): self
    {
        return $this->where('?? = ?', [$field, $id], $op);
    }
public function whereId(string $field, $id, string $op = ''): self
    {
        return $this->where('?? = ?', [$field, $id], $op);
    }
public function whereId ( string $ field , $ id , string $ op = '' ) : self { return $ this -> where ( '?? = ?' , [ $ field , $ id ] , $ op ) ; }
Where id.
@param  string     $field
@param  int|string $id
@param  string     $op
@return self
Where id .