Support for Variables in Extensions, from which version?

[AntonioSousa]

I try to be as compatible as possible when developing extensions, so they can be used in older versions of OneAgent/ActiveGates.

Have to use Variables in one case (link) but can't find when this was first supported? Anyone know the version/Schema?

[maciej_grynda]

We are releasing schema on github GitHub - dynatrace-extensions/extensions-schemas