def create_or_update(volume_resource_name, volume_resource_description, custom_headers:nil)
      response = create_or_update_async(volume_resource_name, volume_resource_description, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def create_or_update(volume_resource_name, volume_resource_description, custom_headers:nil)
      response = create_or_update_async(volume_resource_name, volume_resource_description, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
Creates or updates a Volume resource.

 Creates a Volume resource with the specified name, description and
 properties. If Volume resource with the same name exists, then it is updated
 with the specified description and properties.

 @param volume_resource_name [String] The identity of the volume.
 @param volume_resource_description [VolumeResourceDescription] Description
 for creating a Volume resource.
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [VolumeResourceDescription] operation results.