Give object unsupervised specification class
Examples
model_spec <- list(letters)
model_spec <- new_unsupervised_spec(model_spec)
model_spec
#> [[1]]
#> [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p" "q"
#> [18] "r" "s" "t" "u" "v" "w" "x" "y" "z"
#>
#> attr(,"class")
#> [1] "list" "unsupervised_spec"