presto-mongodb/src/main/java/io/prestosql/plugin/mongodb/MongoClientConfig.java/MongoClientConfig/buildSeeds
class MongoClientConfig:    private List<ServerAddress> buildSeeds(Iterable<String> hostPorts)
    {
        ImmutableList.Builder<ServerAddress> builder = ImmutableList.builder();
        for (String hostPort : hostPorts) {
            List<String> values = PORT_SPLITTER.splitToList(hostPort);
            checkArgument(values.size() == 1 || values.size() == 2, "Invalid ServerAddress format. Requires host[:port]");
            if (values.size() == 1) {
                builder.add(new ServerAddress(values.get(0)));
            }
            else {
                builder.add(new ServerAddress(values.get(0), Integer.parseInt(values.get(1))));
            }
        }
        return builder.build();
    }