/**
   * Takes a list of SqlVisitors and returns a new list with only the SqlVisitors set to apply to
   * rollbacks
   */
  protected List<SqlVisitor> filterRollbackVisitors(final List<SqlVisitor> visitors) {
    final List<SqlVisitor> rollbackVisitors = new ArrayList<SqlVisitor>();
    if (visitors != null) {
      for (SqlVisitor visitor : visitors) {
        if (visitor.isApplyToRollback()) {
          rollbackVisitors.add(visitor);
        }
      }
    }

    return rollbackVisitors;
  }
 @Override
 public boolean dataTypeIsNotModifiable(final String typeName) {
   return unmodifiableDataTypes.contains(typeName.toLowerCase());
 }