public function get(string $key, $field = null)
    {
        return null !== $field ? $this->getTable()->get($key, $field) : $this->getTable()->get($key);
    }
public function get(string $key, $field = null)
    {
        return null !== $field ? $this->getTable()->get($key, $field) : $this->getTable()->get($key);
    }
public function get ( string $ key , $ field = null ) { return null !== $ field ? $ this -> getTable ( ) -> get ( $ key , $ field ) : $ this -> getTable ( ) -> get ( $ key ) ; }
Get data by key and field

@param string $key   Index key
@param string $field Filed name of Index
@return array|false Will return an array when success, return false when failure
@throws Exception\RuntimeException When memory table have not been create
Get data by key and field