Validating result of a transform action

**Citrus Version**
2.8.0

**Question**
Hi there,
I was wondering, if it is possible to validate the result of a transform action in Citrus. I hoped for something like:
```
transform()
.source("")
.xslt(new ClassPathResource("xslt/example.xsl"))
.payload("");
```
Instead, I can only store the result in a variable, which I can't seem to validate. Is there any way to do this using the Citrus validation methods?
Thank you very much!

Start by tracing the transform() action, its xslt(...) result handling, and the existing validation methods; the issue names no source files or tests. Determine whether the stored transform result can be passed through the validation API, and consider the work complete only when the requested XML result validation path is defined and covered by tests.

Written by the indexing model from the issue text.