def attr_configurable_pool nm
      attr_configurable_class(nm,
        :default => OnStomp::Failover::Pools::RoundRobin) do |p|
        p || OnStomp::Failover::Pools::RoundRobin
      end
    end
def attr_configurable_pool nm
      attr_configurable_class(nm,
        :default => OnStomp::Failover::Pools::RoundRobin) do |p|
        p || OnStomp::Failover::Pools::RoundRobin
      end
    end
Creates a readable and writeable attribute with the given name that
 defaults to the {OnStomp::Failover::Pools::RoundRobin}. Corresponds
 the the class to use when creating new
 {OnStomp::Failover::Client#client_pool client pools}.
 @param [Symbol] nm name of attribute