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: client.go
    path of file: ./repos/grab/v3
    
    the code of the file until where you have to start completion: package grab

import (
	"bytes"
	"context"
	"fmt"
	"io"
	"net/http"
	"os"
	"path/filepath"
	"sync"
	"sync/atomic"
	"time"
)

// HTTPClient provides an interface allo
    
func (c *Client) DoChannel(reqch <-chan *Request, respch chan<- *Response) {
	// TODO: enable cancelling of batch jobs
	for req := range reqch {
		resp := c.Do(req)
		respch <- resp
		<-resp.Done
	}
}