IRateLimitServiceGetRateLimiterPolicy 方法
            获取限流策略
            
命名空间: TouchSocket.Rpc.RateLimiting程序集: TouchSocket.Rpc.RateLimiting (在 TouchSocket.Rpc.RateLimiting.dll 中) 版本:4.0.0-beta.143+5fcca7a4e70968794985dc3793adc50531308be6
IRateLimiterPolicy GetRateLimiterPolicy(
	string policyName
)
Function GetRateLimiterPolicy ( 
	policyName As String
) As IRateLimiterPolicy
abstract GetRateLimiterPolicy : 
        policyName : string -> IRateLimiterPolicy 
- policyName  String
 - 限流策略名称
 
IRateLimiterPolicy返回对应的限流策略对象