docs: private Map<String, String> simpleColumnToPropertyMappings(Map<String, ColumnMetaData> cm){
  		Map<String, String> result = new HashMap<String, String>(cm.size());
  		for (Entry<String, ColumnMetaData> entry: cm.entrySet()){
  			result.put(entry.getKey(), entry.getValue().getPropertyName());
  		}
  		return result;
  	}