Handle index expressions in the middle of call chains.

test/regression/other/analysis_server.unit

Index: test/regression/other/analysis_server.unit
diff --git a/test/regression/other/analysis_server.unit b/test/regression/other/analysis_server.unit
index 9e662a71f7955ae0c2f74ff4d5708b930e725513..0c03cfac17565f9c52ca809358de2e1b8604b967 100644
--- a/test/regression/other/analysis_server.unit
+++ b/test/regression/other/analysis_server.unit
@@ -246,4 +246,16 @@ final ListResultDescriptor<AnalysisError> HINTS =
       build(body);
       return irBuilder.makeConstructorDefinition(const [], const []);
     });
-  }
+  }
+>>> (indent 4)
+    Element expectedElement = (declarations[0] as TopLevelVariableDeclaration)
+            .variables
+            .variables[0]
+        .name
+        .staticElement;
+<<<
+    Element expectedElement = (declarations[0] as TopLevelVariableDeclaration)
+        .variables
+        .variables[0]
+        .name
+        .staticElement;