Is ChunkIndices used or could it be removed?

[felixcremer]

I am currently looking into writing tests for the chunks.jl file. Thereby I saw that ChunkIndices is not used in the DiskArrays repository and when I search for it in Zarr.jl it is also not used but Zarr.jl defines its own chunkindices function with this definition:

chunkindices(z::ZArray) = CartesianIndices(map((s, c) -> 1:ceil(Int, s/c), z.metadata.shape[], z.metadata.chunks))

Is the ChunkIndices type actually needed and if so, should it also be used in Zarr.jl.
I would need to check the other dependents of DiskArray whether it is used in the wider ecosystem.