Problem with TreeGrid and spans + TreeCollection
When using TreeGrid, with spans and TreeCollection for data manipulation, an exception is thrown: “Uncaught TypeError: o.findIndex is not a function”. I tested only with versions 7.3.9 and 7.3.10. In version 7.2.5 it works normally without the error.
If using treeCollection and NOT using spans, everything works normally, if NOT using treeCollection and using spans, it also works normally.
Here’s an example: