generate_uuid() generates a universally unique identifier (UUID Version
4 and Variant 1).
generate_uuid(seed = NULL)A single integer specifying the seeds.
If NULL (the default) the seed will be re-initialized.
A character string (UUID).
A 36 characters long character string.
As it relies on R's internal random number generators and so will suffer
from the use of set.seed() in a session, the seed is re-initialized during
execution (unless seed is not NULL). To prevent any side effects, the
random number generator (RNG) state is saved and restored when the function
exits.