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Mention using MockFunction as a way to mock free functions.

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Abseil Team 2023-01-18 09:43:14 -08:00 • committed by Copybara-Service
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@ -285,6 +285,10 @@ If you are concerned about the performance overhead incurred by virtual
functions, and profiling confirms your concern, you can combine this with the
recipe for [mocking non-virtual methods](#MockingNonVirtualMethods).
Alternatively, instead of introducing a new interface, you can rewrite your code
to accept a std::function instead of the free function, and then use
[MockFunction](#MockFunction) to mock the std::function.
### Old-Style `MOCK_METHODn` Macros
Before the generic `MOCK_METHOD` macro