Description
For cases like MB-50350 , there is a requirement in js-evaluator where create library / update library operations should not be allowed in a mixed mode cluster.
Hence, js-evaluator needs a callback to check for a mixedmode cluster.
We've exposed a callback defs.DefaultCheckMixedModeCallback (which by default always returns false). Query, being the embedder should implement this callback returning a boolean indicating whether the cluster is mixed mode or not.