merge
Merges in the fields from the readers in mergeState. The default implementation skips and maps around deleted documents, and calls .write. Implementations can override this method for more sophisticated merging (bulk-byte copying, etc).
Merges in the fields from the readers in mergeState. The default implementation skips and maps around deleted documents, and calls .write. Implementations can override this method for more sophisticated merging (bulk-byte copying, etc).