public static final class DataflowUtility.GroupNames extends Object
displayed), which table's names it publishes (names), and whether the group spans
legacy folded names, which only identities join (acrossLegacyNames).
The member is the first of the group, as always, unless the group spans legacy folded names (a table merged earlier may already span them); then it is the first table that offers names a model minted with its identity (the vendor's bare names, rather than a metadata reader's delimited spelling), its own or ones merged into it earlier, and those are the names published. A staged or incremental merge so names a table as one merge of all the inputs does.
public final boolean acrossLegacyNames