public Set<String> getAnimClipsNames() {
        return Collections.unmodifiableSet(animClipMap.keySet());
    }
Returns an unmodifiable set of all available animation names. When an
attempt is made to modify the set, an UnsupportedOperationException is
thrown.

@return the unmodifiable set of animation names.
jme3-core/src/main/java/com/jme3/anim/AnimComposer.java