R Under development (unstable) (2024-09-25 r87194 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> set.seed(1)
> 
> library(vistla)
> 
> data(chain)
> 
> vistla(Y~.,data=chain,threads=2)->V
> 
> expected_paths<-list(
+  M2=c("M2","M1","Y"),
+  M3=c("M3","M2","M1","Y"),
+  M4=c("M4","M3","M2","M1","Y"),
+  T=c("T","M4","M3","M2","M1","Y")
+ )
> 
> stopifnot(identical(
+  paths(V),
+  expected_paths
+ ))
> 
> stopifnot(identical(
+  hierarchy(V)$name,
+  names(chain)
+ ))
> 
> 
> proc.time()
   user  system elapsed 
   0.17    0.03    0.18