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This attempts to address this issue: flutter/flutter#18304
Users reading the docs were using
GlobalKey<MyFormState>
instead ofGlobalKey<FormState>
. It's an easy mistake to make, sinceMyFormState
andFormState
look quite similar.I've changed
MyFormState
toMyCustomFormState
to hopefully make the two classes more distinct from one another, and added a note to the reader: You must useGlobalKey<FormState>
.Please let me know if you think this will help address the issue, or if you can think of something better :)