could not parse layer type Normalize

[caoyushe]

Thank you for your great work,sir! I have a question, thant when I use this code to parse SSD caffe model, some error happens:
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init plugin proto: ./models/vehDetector/vehDetector.prototxt caffemodel: ./models/vehDetector/vehDetector.caffemodel
Begin parsing model...
could not parse layer type Normalize
ERROR: ssd_error_log: Fail to parse
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I notice that in TensorRT5.0, the offical has give a Normalize plugin in it's samples code,
How can I add those plugins in my own work, thank you very much!