class Redis::Cluster

def send_client_command(command, &block)
  case command[1].to_s.downcase
  when 'list' then @node.call_all(command, &block).flatten
  when 'pause', 'reply', 'setname'
    @node.call_all(command, &block).first
  else assign_node(command).call(command, &block)
  end
end