Can a Remote Evaluator in Arize AX Return Multiple Metrics as Separate Eval Columns?

In Arize AX, is it possible for a Remote Evaluator to return multiple metrics - e.g. as a list wit one entry per metric? Such that Arize unpacks them and writes each as a separate eval column on the span keyed by the "name" field? Because Alyx AI told me that yet when I actually implemented this schema I seem to get an error whenever I "Run Evaulator(s)"?