Report the directed link from turtle to the caller. If no link exists then it reports nobody.
crt 2 ask turtle 0 [ create-link-to turtle 1 ] ask turtle 1 [ show in-link-from turtle 0 ] ;; shows link 0 1 ask turtle 0 [ show in-link-from turtle 1 ] ;; shows nobody
See also: out-link-to link-with
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