Sample rows of a 3 dimensional array without replacement

General Usage
, , ,
2

Maybe something like:

using StatsBase
x = rand(10, 5, 3)
@views sample(CartesianIndices(x[:,1,:]), 3; replace=false)

3-element Vector{CartesianIndex{2}}:
 CartesianIndex(1, 3)
 CartesianIndex(5, 2)
 CartesianIndex(4, 2)
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