Parallelism enables parallel processing between branches.The results from all branches in several branches and their results are then combined.
For instance, if you can use 2 different modules, one in each side each in a separate branch of the Parallelism branch, the and their results will be combined in at the end of the Flowbranching.
In other words, if one module provides a result OK and the other NOK, the result will be NOK, which is a combination of both modules (boolean operator AND).
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