def begin_create_or_update_with_http_info(resource_group_name, service_name, parameters, custom_headers:nil)
      begin_create_or_update_async(resource_group_name, service_name, parameters, custom_headers:custom_headers).value!
    end
def begin_create_or_update_with_http_info(resource_group_name, service_name, parameters, custom_headers:nil)
      begin_create_or_update_async(resource_group_name, service_name, parameters, custom_headers:custom_headers).value!
    end
Creates or updates an API Management service. This is long running operation
 and could take several minutes to complete.

 @param resource_group_name [String] The name of the resource group.
 @param service_name [String] The name of the API Management service.
 @param parameters [ApiManagementServiceResource] Parameters supplied to the
 CreateOrUpdate API Management service operation.
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [MsRestAzure::AzureOperationResponse] HTTP response information.