Keep track of missing SparseArrays function(alitie)s: - [ ] sprand - [ ] sprandn - [ ] Some alternative to sparse - [ ] spzeros(?) - [ ] spdiagm - [ ] blockdiag - [ ] rowvals - [ ] nzrange - [ ] droptol! - [ ] dropzeros[!] - [ ] permute[!] (not sure best way to implement this)