protect.Rdprotect
protect(x) # S3 method for zdd protect(x)
| x | the ZDD to protect, including subnodes  | 
    
|---|
the ZDD, protected
a <- as_zdd(list(c(1,2,3), 4, c(5,6))) protect(a) reset_zdd_store(keep_protected = TRUE) # preserves the protected ZDD assigned to `a`#>