def bindings
      results = Hash.new { |hash, key| hash[key] = [] }
      api_client.bindings.each do |binding|
        next if binding['destination'] == binding['routing_key']
        next unless binding['source'] == @config[:mq_exchange]
        next unless binding['vhost'] == @config[:mq_vhost]
        results[binding['destination']] << binding['routing_key']
      end
      results
    end
def bindings
      results = Hash.new { |hash, key| hash[key] = [] }
      api_client.bindings.each do |binding|
        next if binding['destination'] == binding['routing_key']
        next unless binding['source'] == @config[:mq_exchange]
        next unless binding['vhost'] == @config[:mq_vhost]
        results[binding['destination']] << binding['routing_key']
      end
      results
    end
Return a mapping of queue names to the routing keys they're bound to.