@Override
    public String toString() {
        return "NodeFlagGroup{" +
                "nodeFlags=" + nodeFlags +
                '}';
    }
Adds nodeFlag to the provided flags set after removing the other members of this {@link NodeFlagGroup}

@param nodeFlag Flag to add
@param flags    Set to add to
stroom-core-shared/src/main/java/stroom/explorer/shared/NodeFlagGroup.java