|  | @@ -171,7 +171,7 @@ class ServerContext {
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				|  |  |    /// IsCancelled is always safe to call when using sync or callback API.
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				|  |  |    /// When using async API, it is only safe to call IsCancelled after
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				|  |  | -  /// the AsyncNotifyWhenDone tag has been delivered.
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				|  |  | +  /// the AsyncNotifyWhenDone tag has been delivered. Thread-safe.
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				|  |  |    bool IsCancelled() const;
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				|  |  |    /// Cancel the Call from the server. This is a best-effort API and
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