function
/usr/local/lib/janet/jpm/dagbuild.janet on line 29 , column 1
(pdag f dag &opt n-workers )
Executes a dag by calling f on every node in the graph. Can set the
number of workers for parallel execution. The graph is represented
as a table mapping nodes to arrays of child nodes. Each node will
only be evaluated after all children have been evaluated. Returns a
table mapping each node to the result of `(f node)` .