Check process probably crashed or hung up for 20 minutes ... killed
Most likely this happened in the example checks (?),
if not, ignore the following last lines of example output:
> 
> ## test set
> A_test <- A
> 
> ## training set
> A_train <- crassmat(data = A,            # matrix
+                     sample_thres = 0.20, # remove 20% of observed values
+                     conditional = 1)     # keep > 1 observed values per row
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> 
> 
> 
> ### * <FOOTER>
> ###
> cleanEx()

detaching 'SciViews:TempEnv'

> options(digits = 7L)
> base::cat("Time elapsed: ", proc.time() - base::get("ptime", pos = 'CheckExEnv'),"\n")
Time elapsed:  0.79 0.1 0.89 NA NA 
> grDevices::dev.off()
null device 
          1 
> ###
> ### Local variables: ***
> ### mode: outline-minor ***
> ### outline-regexp: "\\(> \\)?### [*]+" ***
> ### End: ***
> quit('no')
======== End of example output (where/before crash/hang up occured ?) ========