There is no possibility to add test metric with not numeric value

[Lhfvgbh]

Jagger 1.2.5 have default metric Duration which shows the duration of test in human-readable form (hours minutes seconds). Latest Jagger version - 2.0.1-m2 have default metric Duration which shows the duration of test in seconds only and it is not comfortable to understand from the report how much time test has taken.
In order to have a human-readable form of duration, I would like to create my own metric with a string value. However, it turns out that all metric values must be extended from Number class.
It could be important to have an opportunity to add custom metric (with String type of value) to add some test information into the jagger report.

Please, consider the possibility to add custom test metrics with string values if future versions of Jagger framework.