public function whereJson($key, $operator, $value = null)
    {
        return $this->filter($this->jsonOperator(...func_get_args()));
    }
public function whereJson($key, $operator, $value = null)
    {
        return $this->filter($this->jsonOperator(...func_get_args()));
    }
public function whereJson ( $ key , $ operator , $ value = null ) { return $ this -> filter ( $ this -> jsonOperator ( ... func_get_args ( ) ) ) ; }
Where json operator.

@param  $key
@param  $operator
@param  null     $value
@return PostCollection
Where json operator .