presto-kinesis/src/main/java/io/prestosql/plugin/kinesis/KinesisPlugin.java/KinesisPlugin/getConnectorFactories
class KinesisPlugin:    @Override
    public synchronized Iterable<ConnectorFactory> getConnectorFactories()
    {
        if (factory == null) {
            this.factory = new KinesisConnectorFactory();
        }
        return ImmutableList.of(this.factory);
    }