private boolean isNativeBullet() {
        try {
            Class clazz = Class.forName("com.jme3.bullet.util.NativeMeshUtil");
            return clazz != null;
        } catch (ClassNotFoundException exception) {
            return false;
        }
    }
Determine which physics library is in use.

@return true for C++ Bullet, false for JBullet (jme3-jbullet)
jme3-examples/src/main/java/jme3test/bullet/TestIssue1125.java