How to analyse module memory usage/memory leak?

General Usage
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I’m trying to analyse the memory usage of a module I’ve written, named InterpolationData. Calling varinfo(InterpolationData) gives the following:

julia> varinfo(InterpolationData)
name size summary
––––––––––––––––––––– ––––––––– –––––––––––––––––––––––
Cell 232 bytes DataType
InterpolationCellData 264 bytes DataType
InterpolationData 6.540 MiB Module
interpolatecell 0 bytes typeof(interpolatecell)
makecells 0 bytes typeof(makecells)

and the documentation says that this gives the memory usage of “exported global variables”. Clearly the stuff I’m interested in (6.54 MiB) doesn’t qualify. What’s the best way to have a look inside the module and see what it’s up to? I have a memory leak somewhere, and I’d like to see what Julia thinks is using the memory.