code: public MucConfigFormManager setRoomOwners(Collection<? extends Jid> newOwners) throws MucConfigurationNotSupportedException {
          if (!supportsRoomOwners()) {
              throw new MucConfigurationNotSupportedException(MUC_ROOMCONFIG_ROOMOWNERS);
          }
          owners.clear();
          owners.addAll(newOwners);
          return this;
      }
docs: Set the owners of the room.
  
  @param newOwners a collection of JIDs to become the new owners of the room.
  @return a reference to this object.
  @throws MucConfigurationNotSupportedException if the MUC service does not support this option.
  @see #MUC_ROOMCONFIG_ROOMOWNERS