How to build wavelet pooling layer in MATLAB

I want to implement a Wavelet pooling layer for the convolutional layers in MATLAB. Wavelet pooling layer output is the average of two low-frequency subbands of the input's Dual tree complex wavelet transform. Is it possible to define it to be used as a "layer" in the "trainNetwork" function? How?
Any tips are appreciated.

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Asked:

on 4 Feb 2022

Edited:

on 4 Feb 2022

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