public void setCanOccupantsChangeSubject(boolean canOccupantsChangeSubject) {
        this.canOccupantsChangeSubject = canOccupantsChangeSubject;
    }
Sets if participants are allowed to change the room's subject.

@param canOccupantsChangeSubject boolean that specifies if participants are allowed to
       change the room's subject.
xmppserver/src/main/java/org/jivesoftware/openfire/muc/MUCRoom.java