def attr_configurable_client_beats nm
      attr_configurable_arr(nm, :default => [0,0]) do |val|
        val.map { |b| bi = b.to_i; bi < 0 ? 0 : bi }
      end
    end
def attr_configurable_client_beats nm
      attr_configurable_arr(nm, :default => [0,0]) do |val|
        val.map { |b| bi = b.to_i; bi < 0 ? 0 : bi }
      end
    end
Creates a readable and writeable attribute with the given name that
 defaults to [0, 0] and is mapped to a pair of non-negative integers
 when assigned. Corresponds to what heartbeating strategy should be used
 for a given client's connection where [0, 0] indicates no heartbeating
 should be performed.
 @note This attribute is only useful with STOMP 1.1 connections.
 @param [Symbol] nm name of attribute