legacy/src/main/java/thredds/catalog/InvDatasetImpl.java
public void setContributors(List<ThreddsMetadata.Contributor> a) {
    List<ThreddsMetadata.Contributor> dest = tm.getContributors();
    for (ThreddsMetadata.Contributor item : a) {
      if (!dest.contains(item))
        dest.add(item);
    }
    hashCode = 0;
  }
public void setContributors(List<ThreddsMetadata.Contributor> a) {
    List<ThreddsMetadata.Contributor> dest = tm.getContributors();
    for (ThreddsMetadata.Contributor item : a) {
      if (!dest.contains(item))
        dest.add(item);
    }
    hashCode = 0;
  }
LOOK these are wrong