flutter doctor Doctor summary (to see all details, run flutter doctor -v): [ ] Flutter (Channel stable, v1.17.1, on Microsoft Windows [Version 10.0.19041.264], locale zh-CN) [ ] Android toolchain - ...
There seems to a problem with <collection> if you give HashMap.entrySet() as parameter, because somehow then item.value does not lead to the value of the entry, but the value property of the value ...