首先创建参数，然后在其上设置示例。然后将其添加到路径定义中。

subscriberParameter := openapi3.NewPathParameter("subscriberid").WithDescription("SubscriberIdentifier").WithRequired(true).
        WithSchema(openapi3.NewStringSchema())
    
    subscriberParameter.Example = "exampleId"
    
    swagger.Paths = openapi3.Paths{
        "/postval/subsid/{subscriberid}/updatefle": &openapi3.PathItem{
            Post: &openapi3.Operation{
                OperationID: "postvalue",
                Parameters: []*openapi3.ParameterRef{
                    {
                        Value: subscriberParameter,
                    },
                },
            },
        },
    }