I've created a gallery using image advanced. For a couple of the images, I have added a custom class. However, the custom classes aren't included when I use rwmb_meta() to get the images. Where do I get the custom classes from. Is it a WordPress thing rather than a metabox.io thing?
Actually, having looked at another site of mine, the 'Custom class' field seems to have been added by a plugin (probably foogallery). I'll have to look into it.
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