@Override
    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        ExternalizableUtil.getInstance().readStrings(in, identities);
        ExternalizableUtil.getInstance().readStrings(in, features);
        verAttribute = ExternalizableUtil.getInstance().readSafeUTF(in);
    }
Determines whether or not a given feature is included in these entity
capabilities.

@param feature the feature
@return true if feature is included, false if not
xmppserver/src/main/java/org/jivesoftware/openfire/entitycaps/EntityCapabilities.java