Observatory:

runtime/vm/object_graph.h

 // 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.
 
 #ifndef RUNTIME_VM_OBJECT_GRAPH_H_
 #define RUNTIME_VM_OBJECT_GRAPH_H_
 
 #include "vm/allocation.h"
 
 namespace dart {
@@ skipping 82 matching lines @@
   // there is room. Returns the number of objects found.
   //
   // An object for which this function answers no inbound references might still
   // be live due to references from the stack or embedder handles.
   intptr_t InboundReferences(Object* obj, const Array& references);
 
   enum SnapshotRoots { kVM, kUser };
 
   // Write the isolate's object graph to 'stream'. Smis and nulls are omitted.
   // Returns the number of nodes in the stream, including the root.
-  // If collect_garabage is false, the graph will include weakly-reachable
+  // If collect_garbage is false, the graph will include weakly-reachable
   // objects.
   // TODO(koda): Document format; support streaming/chunking.
   intptr_t Serialize(WriteStream* stream,
                      SnapshotRoots roots,
                      bool collect_garbage);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ObjectGraph);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_OBJECT_GRAPH_H_