Fixed analysis error. (#10035)

2017-05-12 10:03:18 -07:00
parent 5bce52d6be
commit af4905ffbb
1 changed files with 1 additions and 1 deletions
--- a/packages/flutter/lib/src/material/expansion_tile.dart
+++ b/packages/flutter/lib/src/material/expansion_tile.dart
@@ -112,7 +112,7 @@ class _ExpansionTileState extends State<ExpansionTile> with SingleTickerProvider
      if (_isExpanded)
        _controller.forward();
      else
-        _controller.reverse().then((Null value) {
+        _controller.reverse().then<Null>((Null value) {
          setState(() {
            // Rebuild without widget.children.
          });