Nuke sampler node in Fusion (Davinci Resolve)

I'd like to check how even/uneven is the lighting of the green screen in the footage using the equivalent of Nuke's sampler node (see attached, it displays a line by colour channel, a straight line means even lighting).
Is there something similar in the Fusion tab? if not will there be one?

There is a match function in the color corrector node. It has RGB analytic curve graph but I 'm not certain it would help you.

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