public boolean isPrimaryReplicaReader() {
    return reader.isPrimaryReplicaReader();
  }
All {@link StoreFileReader} for the same StoreFile will share the
{@link StoreFileInfo#refCount}. Counter that is incremented every time a scanner is created on
the store file. It is decremented when the scan on the store file is done.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileReader.java