@Nullable
    public static Object doCaptureIfNotTtlEnhanced(@Nullable Object obj) {
        if (obj instanceof TtlEnhanced) return null;
        else return capture();
    }
Add {@code try-finally} logic to method.

@return the body code of method rewritten
ttl-agent/src/main/java/com/alibaba/ttl3/agent/transformlet/helper/TtlTransformletHelper.java