protected void setScans(List<Scan> scans) {
    this.scans = scans;
  }
Allows subclasses to set the list of {@link Scan} objects.
@param scans The list of {@link Scan} used to define the input
hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableInputFormatBase.java