driver-core/src/main/com/mongodb/operation/FsyncUnlockOperation.java
@Deprecated
    @Override
    public BsonDocument execute(final WriteBinding binding) {
        return withConnection(binding, new CallableWithConnection<BsonDocument>() {
            @Override
            public BsonDocument call(final Connection connection) {
                if (serverIsAtLeastVersionThreeDotTwo(connection.getDescription())) {
                    return executeCommand(binding, "admin", FSYNC_UNLOCK_COMMAND, connection);
                } else {
                    return queryUnlock(connection);
                }
            }
        });
    }
@Deprecated
    @Override
    public BsonDocument execute(final WriteBinding binding) {
        return withConnection(binding, new CallableWithConnection<BsonDocument>() {
            @Override
            public BsonDocument call(final Connection connection) {
                if (serverIsAtLeastVersionThreeDotTwo(connection.getDescription())) {
                    return executeCommand(binding, "admin", FSYNC_UNLOCK_COMMAND, connection);
                } else {
                    return queryUnlock(connection);
                }
            }
        });
    }
Unlocks the MongoDB server, allowing write operations to go through.

@param binding the binding to execute in the context of
@return the result of the operation
@deprecated use {@link #execute(ReadBinding)} instead.