@Override
  Scan setMvccReadPoint(long mvccReadPoint) {
    throw new UnsupportedOperationException(
      "ImmutableScan does not allow access to setMvccReadPoint");
  }
Create Immutable instance of Scan from given Scan object
@param scan Copy all values from Scan
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableScan.java