public void writeStrings(DataOutput out, Collection<String> collection) throws IOException {
        strategy.writeStrings(out, collection);
    }
Writes content of collection of strings to the output stream.

@param out           the output stream.
@param collection    the Collection of Strings.
@throws IOException if an error occurs.
xmppserver/src/main/java/org/jivesoftware/util/cache/ExternalizableUtil.java