                     -norm-7a7d18a4f40c
          SSIM http://www.cns.nyu.edu/pub/eero/wang03-reprint.pdf
          GMSD https://arxiv.org/ftp/arxiv/papers/1308/1308.3052.pdf
          """
          logger.debug("Setting Loss config")
          section = "global.loss"
 
</s> remove                  "penalty will only be applied if SSIM or GMSD is selected for the main loss "
                 "function, otherwise it is ignored.\n\nThe value given here is as a percentage "
                 "weight of the main loss function. For example:"
 </s> add                  "penalty will only be applied if SSIM, MS-SSIM or GMSD is selected for the main "
                 "loss function, otherwise it is ignored."
                 "\n\nThe value given here is as a percentage weight of the main loss function. "
                 "For example:" </s> remove         self._uses_l2_reg = ["ssim", "gmsd"]
 </s> add         self._uses_l2_reg = ["ssim", "ms_ssim", "gmsd"] </s> remove             choices=["mae", "mse", "logcosh", "smooth_loss", "l_inf_norm", "ssim", "gmsd",
                     "pixel_gradient_diff"],
 </s> add             choices=["mae", "mse", "logcosh", "smooth_loss", "l_inf_norm", "ssim", "ms_ssim",
                     "gmsd", "pixel_gradient_diff"],
        MSSIM https://www.cns.nyu.edu/pub/eero/wang03b.pdf
                     -norm-7a7d18a4f40c
          SSIM http://www.cns.nyu.edu/pub/eero/wang03-reprint.pdf
        MSSIM https://www.cns.nyu.edu/pub/eero/wang03b.pdf
          GMSD https://arxiv.org/ftp/arxiv/papers/1308/1308.3052.pdf
          """
          logger.debug("Setting Loss config")
          section = "global.loss"
keep add keep keep keep keep
 training - Add MS-SSIM loss function 
plugins/train/_config.py