legacy/src/main/java/thredds/catalog/InvDatasetImpl.java
public Object getUserProperty(Object key) {
    if (userMap == null) return null;
    return userMap.get(key);
  }
public Object getUserProperty(Object key) {
    if (userMap == null) return null;
    return userMap.get(key);
  }
Look up the User property having the given key

@param key property key
@return User property having the given key, or null