flattenOrder: Remove nesting of groups within an order/group
Description
This function reduces a potentially nested order to its flattened
representation, containing no nested groups. Entities are ordered in the
result by their first appearance in the order object.
Usage
flattenOrder(x)
Arguments
x
VariableOrder, DatasetOrder, VariableGroup, or DatasetGroup; or a
CrunchDataset or catalog that has an ordering property.