Fix analyzer warning / bug: Iterable was treated as if it has sublist()

test/pb_list_test.dart

Index: test/pb_list_test.dart
diff --git a/test/pb_list_test.dart b/test/pb_list_test.dart
index 40a5b537a8810ac1895e751308c43926e573e564..ce9fa0905bbe409e46b1597682be972c419765f9 100755
--- a/test/pb_list_test.dart
+++ b/test/pb_list_test.dart
@@ -61,6 +61,21 @@ void main() {
     lb2.removeRange(5, 8);
     expect(lb2, [1, 2, 3, 9, 8, 9]);
 
+    expect(() => lb2.setRange(5, 7, [88, 99].take(2)), throwsRangeError);
+    expect(lb2, [1, 2, 3, 9, 8, 9]);
+
+    expect(() => lb2.setRange(5, 7, [88, 99].take(2), 1), throwsRangeError);
+    expect(lb2, [1, 2, 3, 9, 8, 9]);
+
+    expect(() => lb2.setRange(4, 6, [88, 99].take(1), 1), throwsStateError);
+    expect(lb2, [1, 2, 3, 9, 8, 9]);
+
+    lb2.setRange(5, 6, [88, 99].take(2));
+    expect(lb2, [1, 2, 3, 9, 8, 88]);
+
+    lb2.setRange(5, 6, [88, 99].take(2), 1);
+    expect(lb2, [1, 2, 3, 9, 8, 99]);
+
     expect(() { (new PbList<int>() as dynamic).add('hello'); }, throws);
 
     PbSint32List listSint32 = new PbSint32List();