How to log/print variable?

According to the documentation it seems possible to log variables, but with yaks 0.12 I'm not able to get it to work.

https://citrusframework.org/yaks/reference/html/index.html#steps-variables

I tried with single quotes, but it then logs everything as text and yaks doesn't resolve the variable.

When I try this:
```
Given variable datetime is "citrus:currentDate('yyyyMMddHHmmss')"
Given variable corrMessageId is "MESSAGE-${datetime}"
Then print "CorrMessageId: ${corrMessageId}"
```

I get an error like:

```
[ERROR] Run 1: The step 'print "CorrMessageId: ${corrMessageId}"' is undefined.
You can implement this step using the snippet(s) below:

@Then("print {string}")
public void print(String string) {
// Write code here that turns the phrase above into concrete actions
throw new io.cucumber.java.PendingException();
}
```