private void stop() {
        emitter.setParticlesPerSec(0);
        emitted = false;
        if (!killParticles.stopRequested) {
            emitter.addControl(killParticles);
            killParticles.stopRequested = true;
        }

    }
Internal use only

@see Track#setTime(float, float, com.jme3.animation.AnimControl,
com.jme3.animation.AnimChannel, com.jme3.util.TempVars)
jme3-core/src/main/java/com/jme3/animation/EffectTrack.java