public function fetchById($str_id)
    {
        return $this->obj_gateway
            ->withSchema($this->obj_schema)
            ->withTransaction($this->str_transaction_id)
            ->fetchById($str_id);
    }
public function fetchById($str_id)
    {
        return $this->obj_gateway
            ->withSchema($this->obj_schema)
            ->withTransaction($this->str_transaction_id)
            ->fetchById($str_id);
    }
public function fetchById ( $ str_id ) { return $ this -> obj_gateway -> withSchema ( $ this -> obj_schema ) -> withTransaction ( $ this -> str_transaction_id ) -> fetchById ( $ str_id ) ; }
Fetch a single Entity from the Datastore, by it's Key ID

Only works for root Entities (i.e. those without parent Entities)

@param $str_id
@return Entity|null
Fetch a single Entity from the Datastore by it s Key ID