public void setEndSize(float endSize) {
        this.endSize = endSize;
    }
Set the end size of the particles spawned.

<p>The
particle size at any time is determined by blending the start size
and end size based on the particle's current time of life relative
to its end of life.

@param endSize the end size of the particles spawned.
jme3-core/src/main/java/com/jme3/effect/ParticleEmitter.java