The expression tree materializer currently works by looking up a SchemaPath in a RecordBatch to get the corresponding ValueVector.
I'd like to allow for similar functionality, but substituting the RecordBatch with a RecordBatchLoader. Note that both classes already implement the required getValueVectorId(SchemaPath) method. It seems there are several ways to make this work (generics, additional interface, additional materializer, etc.), but the most appropriate solution is not obvious to me. What's the best way to go about this? Thanks, Ben
