Adam Barth 7ab122e557 PopupMenuButton should lazily build menu items
Previously, the client of PopupMenuButton needed to build all the menu times

when building the PopupMenuButton. This can get expensive if, for example, each
item in a scrollable list has a popup menu associated with it.

Now the client passes a builder function to the PopupMenuButton that gets
invoked only when its time to show the menu items.
2016-04-06 13:28:09 -07:00
..
2016-03-18 11:15:07 -07:00

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