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: writer.go
    path of file: ./repos/learning/golang/practice/go-crontab/gopath/src/github.com/coreos/etcd/vendor/github.com/sirupsen/logrus
    
    the code of the file until where you have to start completion: package logrus

import (
	"bufio"
	"io"
	"runtime"
)

func (logger *Logger) Writer() *io.PipeWriter {
	return logger.WriterLevel(InfoL
    
func (entry *Entry) WriterLevel(level Level) *io.PipeWriter {
	reader, writer := io.Pipe()

	var printFunc func(args ...interface{})

	switch level {
	case DebugLevel:
		printFunc = entry.Debug
	case InfoLevel:
		printFunc = entry.Info
	case WarnLevel:
		printFunc = entry.Warn
	case ErrorLevel:
		printFunc = entry.Error
	case FatalLevel:
		printFunc = entry.Fatal
	case PanicLevel:
		printFunc = entry.Panic
	default:
		printFunc = entry.Print
	}

	go entry.writerScanner(reader, printFunc)
	runtime.SetFinalizer(writer, writerFinalizer)

	return writer
}