https://travis-ci.org/github/bitcoin/bitcoin/jobs/679885530#L8791
{
    AssertLockHeld(cs_wallet);
    setLockedCoins.insert(output);
}
void CWallet::UnlockCoin(const COutPoint& output)
{
    AssertLockHeld(cs_wallet);
    setLockedCoins.erase(output);
}
void CWallet::UnlockAllCoins()
{
    AssertLockHeld(cs_wallet);
    setLockedCoins.clear();
}
bool CWallet::IsLockedCoin(uint256 hash, unsigned int n) const