@Override
        public boolean equals(final Object o) {
            if (this == o) {
                return true;
            }
            if (o == null || getClass() != o.getClass()) {
                return false;
            }
            final NodeInfo nodeInfo = (NodeInfo) o;
            return severity == nodeInfo.severity
                   && Objects.equals(description, nodeInfo.description);
        }
Sets the presence of nodeFlag in this node's set of {@link NodeFlag}s and
removes the other members of nodeFlagGroup
stroom-core-shared/src/main/java/stroom/explorer/shared/ExplorerNode.java