def delete_connection(api)
      @subscribers.delete_if {|x| x.api == api}
      @publishers.delete_if {|x| x.api == api}
      @services.delete_if {|x| x.api == api}
    end
def delete_connection(api)
      @subscribers.delete_if {|x| x.api == api}
      @publishers.delete_if {|x| x.api == api}
      @services.delete_if {|x| x.api == api}
    end
Delete connection of this api (XMLRPC URI).
 @param [String] api URI of node to delete connection.