I like testing new early adopter features, it's a great way to get a peek what's coming. But PLEASE to allow us doing so also release - at least rudimentary - documentation at the same time as new features are available. Either in the product itself or in the official documentation (marked as early adopter as well).
Otherwise providing feedback and test-driving becomes a frustrating experience....
For example, in the new "code" tab of the data explorer - seems powerful! But what is a BINARYCRITERION, ... where is the documentation or autocompletion?
Solved! Go to Solution.
The message is indeed a little crypt because it is early adopter, but also remember that you are just building a Metrics V2 API query there, so you can follow the documentation that is pretty extensive here:
For instance, a filter transformation needs a criteria (prefix, ne, eq, remainer, etc), which you are missing, it just so happen that we are exposing these weird internal names instead of a friendly message for now.