当在设置的周期内，没有接收/发送任何数据，则判定该客户端掉线。执行清理。默认配置：60秒为一个周期，同时检测发送和接收。
服务器、客户端均适用。public static CheckClearPlugin<TClient> UseCheckClear<TClient>(
this IPluginManager pluginManager
)
where TClient : class, IClient, IClosableClient
<ExtensionAttribute>
Public Shared Function UseCheckClear(Of TClient As {Class, IClient, IClosableClient}) (
pluginManager As IPluginManager
) As CheckClearPlugin(Of TClient)[<ExtensionAttribute>]
static member UseCheckClear :
pluginManager : IPluginManager -> CheckClearPlugin<'TClient> when 'TClient : not struct and IClient and IClosableClient[缺少 "M:TouchSocket.Sockets.SocketPluginManagerExtension.UseCheckClear``1(TouchSocket.Core.IPluginManager)" 的 <typeparam name="TClient"/> 文档]