def to_obj(ref)
      return front if ref.nil?
      return front[ref.to_s] if DRbURIOption === ref
      @idconv.to_obj(ref)
    end
def to_obj(ref)
      return front if ref.nil?
      return front[ref.to_s] if DRbURIOption === ref
      @idconv.to_obj(ref)
    end
Convert a dRuby reference to the local object it refers to.