To keep scale of color-coding consistent during multiple explanations on the same image.

For example, I have been working on an app where you compute explanation for the same image at different times during training, to see how feature importance changes during training (in a particular setting where this make sense: Continual Learning. I am visualizing catastrophic forgetting)
But if scale of the color-coding changes at every plot, the sequence of explanation doen't make sense anymore (visually)

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