Converting PromptVersion to Templating Template: Best Practices

phoenix.client.types.PromptVersion has a _dumps which allows me to get the raw template, but it's an internal method. Otherwise format only produce the final prompt with all variables provided. I can probably do something like this: prompt.format(variables={"text": "{text}"}) but that seems a bit hacky.

LLMEvaluator class receives a prompt_template parameter, so I need to have the raw prompt available.