func Warn(args ...interface{}) {
	std.Warn(args...)
}
Warn logs a message at level Warn on the standard logger.
package logrus
import (
	"io"
)
var (
	std = New()
)
func StandardLogger() *Logger {
	return std
}
func SetOutput(out io.Writer) {
	std.mu.Lock()
	defer std.mu.Unlock()
	std.Out = out
}
func SetFormatter(formatter Formatter) {
	std.mu.Lock()
	defer std.mu.Unlock()
	std.Formatter = formatter
}
func SetLevel(level Level) {
	std.mu.Lock()
	defer std.mu.Unlock()
	std.Level = level
}
func GetLevel() Level {
	std.mu.Lock()
	defer std.mu.Unlock()
	return std.Level
}
func AddHook(hook Hook) {
	std.mu.Lock()
	defer std.mu.Unlock()
	std.Hooks.Add(hook)
}
func WithField(key string, value interface{}) *Entry {
	return std.WithField(key, value)
}
func WithFields(fields Fields) *Entry {
	return std.WithFields(fields)
}
func Debug(args ...interface{}) {
	std.Debug(args...)
}
func Print(args ...interface{}) {
	std.Print(args...)
}
func Info(args ...interface{}) {
	std.Info(args...)
}