def update(resource_group_name, service_name, sid, parameters, if_match, notify:nil, custom_headers:nil)
      response = update_async(resource_group_name, service_name, sid, parameters, if_match, notify:notify, custom_headers:custom_headers).value!
      nil
    end
def update(resource_group_name, service_name, sid, parameters, if_match, notify:nil, custom_headers:nil)
      response = update_async(resource_group_name, service_name, sid, parameters, if_match, notify:notify, custom_headers:custom_headers).value!
      nil
    end
Updates the details of a subscription specified by its identifier.

 @param resource_group_name [String] The name of the resource group.
 @param service_name [String] The name of the API Management service.
 @param sid [String] Subscription entity Identifier. The entity represents the
 association between a user and a product in API Management.
 @param parameters [SubscriptionUpdateParameters] Update parameters.
 @param if_match [String] ETag of the Entity. ETag should match the current
 entity state from the header response of the GET request or it should be *
 for unconditional update.
 @param notify [Boolean] Notify change in Subscription State.
 - If false, do not send any email notification for change of state of
 subscription
 - If true, send email notification of change of state of subscription
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.