public void setRepeating(boolean isRepeating) {
    this.isRepeating = isRepeating;
  }
Sets the isRepeating flag. Recurses over structs and unions so that the
flags are set correctly.
@param isRepeating flag for repeating value.
storage-api/src/java/org/apache/hadoop/hive/ql/exec/vector/ColumnVector.java