Get list of primative unary fns.
# S3 method for UnaryFnList as.list(x, ...)
| x | UnaryFn derived classe to extract  | 
    
|---|---|
| ... | not used.  | 
    
list of non UnaryFnList functions
#> [[1]] #> [1] "base::sin(x=., )" #>#> [[1]] #> [1] "base::sin(x=., )" #> #> [[2]] #> [1] "base::cos(x=., )" #>