How to use the @0x/contracts-test-utils.ExchangeFunctionName.FillOrder function in @0x/contracts-test-utils

public async fillOrderAsync(
        order: Order,
        takerAssetFillAmount: BigNumber,
        signature: string,
        txData: TxData,
        sendTxOpts: Partial = { shouldValidate: true },
    ): Promise {
        assert.doesConformToSchema('order', order, schemas.orderSchema);
        assert.isValidBaseUnitAmount('takerAssetFillAmount', takerAssetFillAmount);
        return this._executeTxThroughCoordinatorAsync(
            ExchangeFunctionName.FillOrder,
            txData,
            sendTxOpts,
            [order],
            order,
            takerAssetFillAmount,
            signature,
        );
    }