Basic sanity test for the callbacks visualization. Would have prevented regression fixed in https://github.com/plotly/dash/pull/1103 and https://github.com/plotly/dash/pull/1174 (cherry-picked from #1103)
Basic sanity test for the callbacks visualization.
Would have prevented regression fixed in #1103 and #1174 (cherry-picked from #1103)