@Override
    protected void setTransformRefresh() {
        super.setTransformRefresh();
        for (Spatial child : children.getArray()) {
            if ((child.refreshFlags & RF_TRANSFORM) != 0) {
                continue;
            }

            child.setTransformRefresh();
        }
    }
<code>getQuantity</code> returns the number of children this node
maintains.

@return the number of children this node maintains.
jme3-core/src/main/java/com/jme3/scene/Node.java