You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: h5.go
    path of file: ./repos/gopay/lakala
    
    the code of the file until where you have to start completion: package lakala

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"

	"github.com/go-pay/gopay"
)

// 创建H5支付单
// 文档：https://payjp.lakala.com/docs/cn/#api-MobileH5-NewMobileH5Pay
func (c *Client) CreateH5PayOrder(ctx context.Context, orderId string, bm gopay.BodyMap) (rsp *PaymentRsp, err error) {
	if orderId == gopay.NULL {
		return nil, fmt.Errorf("orderId is empty")
	}
	if err = bm.CheckEmptyError("description", 
    
func (c *Client) CreateH5PayOrder(ctx context.Context, orderId string, bm gopay.BodyMap) (rsp *PaymentRsp, err error) {
	if orderId == gopay.NULL {
		return nil, fmt.Errorf("orderId is empty")
	}
	if err = bm.CheckEmptyError("description", "price", "channel"); err != nil {
		return nil, err
	}
	url := fmt.Sprintf(newH5Order, c.PartnerCode, orderId)
	bs, err := c.doPut(ctx, url, bm)
	if err != nil {
		return nil, err
	}
	rsp = new(PaymentRsp)
	err = json.Unmarshal(bs, rsp)
	if err != nil {
		return nil, fmt.Errorf("[%w], bytes: %s", gopay.UnmarshalErr, string(bs))
	}
	return rsp, nil
}