public boolean isAnimated() {
        return getBuffer(Type.BoneIndex) != null
                || getBuffer(Type.HWBoneIndex) != null;
    }
Determines if the mesh uses bone animation.

A mesh uses bone animation if it has bone index / weight buffers
such as {@link Type#BoneIndex} or {@link Type#HWBoneIndex}.

@return true if the mesh uses bone animation, false otherwise
jme3-core/src/main/java/com/jme3/scene/Mesh.java