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+package net.onrc.onos.api.flowmanager;%0A%0A/**%0A * An generator of %7B@link FlowId%7D.%0A */%0Apublic interface FlowIdGenerator %7B%0A    /**%0A     * Generates a globally unique %7B@link FlowId%7D instance.%0A     *%0A     * @return a globally unique %7B@link FlowId%7D instance.%0A     */%0A    FlowId getNextId();%0A%7D%0A

Define an interface to generate FlowId