Use words! closureFunc -> function, closureCtxt -> context.

runtime/observatory/lib/src/service/object.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of service;
 
 /// An RpcException represents an exceptional event that happened
 /// while invoking an rpc.
 abstract class RpcException implements Exception {
   RpcException(this.message);
@@ skipping 1776 matching lines @@
 
   String toString() => 'Class($vmName)';
 }
 
 class Instance extends ServiceObject {
   @observable Class clazz;
   @observable int size;
   @observable int retainedSize;
   @observable String valueAsString;  // If primitive.
   @observable bool valueAsStringIsTruncated;
-  @observable ServiceFunction closureFunc;  // If a closure.
-  @observable Context closureCtxt;  // If a closure.
+  @observable ServiceFunction function;  // If a closure.
+  @observable Context context;  // If a closure.
   @observable String name;  // If a Type.
   @observable int length; // If a List.
 
   @observable var typeClass;
   @observable var fields;
   @observable var nativeFields;
   @observable var elements;
   @observable var userName;
   @observable var referent;  // If a MirrorReference.
   @observable Instance key;  // If a WeakProperty.
   @observable Instance value;  // If a WeakProperty.
 
-  bool get isClosure => closureFunc != null;
+  bool get isClosure => function != null;
 
   Instance._empty(ServiceObjectOwner owner) : super._empty(owner);
 
   void _update(ObservableMap map, bool mapIsRef) {
     // Extract full properties.
     _upgradeCollection(map, isolate);
 
     clazz = map['class'];
     size = map['size'];
     valueAsString = map['valueAsString'];
     // Coerce absence to false.
     valueAsStringIsTruncated = map['valueAsStringIsTruncated'] == true;
-    closureFunc = map['closureFunc'];
-    closureCtxt = map['closureCtxt'];
+    function = map['function'];
+    context = map['context'];
     name = map['name'];
     length = map['length'];
 
     if (mapIsRef) {
       return;
     }
 
     nativeFields = map['nativeFields'];
     fields = map['fields'];
     elements = map['elements'];
     typeClass = map['type_class'];
     userName = map['user_name'];
     referent = map['referent'];
     key = map['key'];
     value = map['value'];
 
     // We are fully loaded.
     _loaded = true;
   }
 
   String get shortName {
     if (isClosure) {
-      return closureFunc.qualifiedName;
+      return function.qualifiedName;
     }
     if (valueAsString != null) {
       return valueAsString;
     }
     return 'a ${clazz.name}';
   }
 
   Future<ServiceObject> evaluate(String expression) {
     return isolate._eval(this, expression);
   }
@@ skipping 1295 matching lines @@
     var v = list[i];
     if ((v is ObservableMap) && _isServiceMap(v)) {
       list[i] = owner.getFromMap(v);
     } else if (v is ObservableList) {
       _upgradeObservableList(v, owner);
     } else if (v is ObservableMap) {
       _upgradeObservableMap(v, owner);
     }
   }
 }