Issue 22593. Quick fix 'import library' for typedefs.

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

Index: pkg/analysis_server/lib/src/services/correction/fix_internal.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
index b149b1315dd0560bcc802f7d9e0138eb28f9a25f..77ebd4f7eb49b48912cd2c3f1bfe65cab231f8d5 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -1194,6 +1194,7 @@ class FixProcessor {
     if (_mayBeTypeIdentifier(node)) {
       String typeName = (node as SimpleIdentifier).name;
       _addFix_importLibrary_withElement(typeName, ElementKind.CLASS);
+      _addFix_importLibrary_withElement(typeName, ElementKind.FUNCTION_TYPE_ALIAS);
     }
   }