Handle index expressions in the middle of call chains.

test/splitting/invocations.stmt

Index: test/splitting/invocations.stmt
diff --git a/test/splitting/invocations.stmt b/test/splitting/invocations.stmt
index 3d2a5032d43c525b6e9249a4827e1f3af5538758..e22e28307912dd0575938bd3d91aa6d4b57c7ee9 100644
--- a/test/splitting/invocations.stmt
+++ b/test/splitting/invocations.stmt
@@ -159,4 +159,34 @@ object
     ?.method()
     .method()
     ?.method()
-    .method();
+    .method();
+>>> index in property chain
+someReceiverObject.property1.property2
+        .property3[0]
+    .property4
+    .property5
+    .property6;
+<<<
+someReceiverObject
+    .property1
+    .property2
+    .property3[0]
+    .property4
+    .property5
+    .property6;
+>>> chained indexes
+someReceiverObject.property1.property2
+            .property3[argument]
+        [argument][argument]
+    .property4
+    .property5
+    .property6;
+<<<
+someReceiverObject
+    .property1
+    .property2
+    .property3[argument][argument]
+        [argument]
+    .property4
+    .property5
+    .property6;