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warning C26140: Undefined lock kind <lock> in annotation <annotation> on lock <lock>.

_Has_lock_kind_(MUTEXa) HANDLE gMutex; 

struct CorrectExample 
    _Has_lock_kind_(_Lock_kind_mutex_) HANDLE mMutex; 
    _Guarded_by_(mMutex) int mData; 
_When_(return == WAIT_OBJECT_0 || return == WAIT_ABANDONED, _Acquires_lock_(gMutex))
DWORD UndefinedLockKind() // Warning C26140 
    DWORD result = WaitForSingleObject(gMutex, 1000); 
    return result;
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