@NonNull
    public String getClassName() {
        return className;
    }
Class Info for {@link TtlTransformlet}.

<B><I>Caution:</I></B><br>
Do <b>NOT</b> load {@link Class} which is transforming, or the transform will lose effectiveness.

@author Jerry Lee (oldratlee at gmail dot com)
@since 3.0.0
ttl2-compatible/src/main/java/com/alibaba/ttl/threadpool/agent/transformlet/ClassInfo.java