We have some use cases where rendering helm charts with overridden values causes helm to produce warnings on stderr, but otherwise finishes successfully. We use the helm.RenderTemplate() method to perform this rendering. Unfortunately, the method only supports returning the combined stdout+stderr and this causes our subsequent UnmarshalK8SYaml() call to fail because the text is no longer valid YAML.

It would be nice if the method could be called while keeping the two output streams separated. A couple of ideas are to either create a second method that works this way, or perhaps passing an option to the current method to allow this behavior.