code: public void releaseAll(ParticleEmitter emitter) {
  		if( !particlesByEmitter.isEmpty() )
  		{
  			Iterator it= particlesByEmitter.values().iterator();
  			while( it.hasNext())
  			{
  				ParticlePool pool= (ParticlePool)it.next();
  				for (int i=0;i<pool.particles.length;i++) {
  					if (pool.particles[i].inUse()) {
  						if (pool.particles[i].getEmitter() == emitter) {
  							pool.particles[i].setLife(-1);
  							release(pool.particles[i]);
  						}
  					}
  				}
  			}
  		}
  	}
docs: Release all the particles owned by the specified emitter
  
  @param emitter The emitter owning the particles that should be released