BulkUpdateOperationDescriptor has two Script methods. ``` public BulkUpdateOperationDescriptor<TDocument, TPartialDocument> Script(Action<InlineScriptDescriptor> configure) ``` and ``` public BulkUpdateOperationDescriptor<TDocument, TPartialDocument> Script(ScriptBase script) ``` The method with the `Action<StoredScriptIdDescriptor> configure` parameter is missing, so there is no way to use stored script with `params`.