@Nullable
  public synchronized MigrationMap findMigrationMap(@NotNull String name) {
    if (myMaps == null) {
      loadMaps();
    }
    for (MigrationMap map : myMaps) {
      if (name.equals(map.getName())) {
        return map;
      }
    }
    return null;
  }
@Nullable
  public synchronized MigrationMap findMigrationMap(@NotNull String name)