def get (k)
      k = k.to_s
      m = lib.tab_get(@db, k, Rufus::Tokyo.blen(k))

      return nil if m.address == 0

      Map.to_h(m) # which frees the map
    end
def get (k)
      k = k.to_s
      m = lib.tab_get(@db, k, Rufus::Tokyo.blen(k))

      return nil if m.address == 0

      Map.to_h(m) # which frees the map
    end
Returns the value (as a Ruby Hash) else nil

 (the actual #[] method is provided by HashMethods)