Creating gds file example?

[biona001]

Hello, how would I use this package to create some gds files?

Reading the source code, put_attr_gdsn seems like the logical candidate but it doesn't work

using jugds
sigma = rand(5, 5)
gds = create_gds("test_gds.gds") # create empty gds
put_attr_gdsn(gds, "sigma", sigma) # write to gds

ERROR: MethodError: no method matching put_attr_gdsn(::type_gdsfile, ::String, ::Matrix{Float64})
Closest candidates are:
  put_attr_gdsn(::type_gdsnode, ::String, ::Any) at /scratch/users/bbchu/.julia/packages/jugds/mO314/src/jugds.jl:283

Above code was ran on Julia 1.6