type Formatter struct {
	// FieldsOrder - default: fields sorted alphabetically
	FieldsOrder []string
	// TimestampFormat - default: time.StampMilli = "Jan _2 15:04:05.000"
	TimestampFormat string
	// HideKeys - show [fieldValue] instead of [fieldKey:fieldValue]
	HideKeys bool
	// NoColors - disable colors
	NoColors bool
	// NoFieldsColors - apply colors only to the level, default is level + fields
	NoFieldsColors bool
	// NoFieldsSpace - no space between fields
	NoFieldsSpace bool
	// ShowFullLevel - show a full level [WARNING] instead of [WARN]
	ShowFullLevel bool
	// NoUppercaseLevel - no upper case for level value
	NoUppercaseLevel bool
	// TrimMessages - trim whitespaces on messages
	TrimMessages bool
	// CallerFirst - print caller info first
	CallerFirst bool
	// CustomCallerFormatter - set custom formatter for caller info
	CustomCallerFormatter func(*runtime.Frame) string
}

import (
	nested "github.com/antonfisher/nested-logrus-formatter"
	"github.com/sirupsen/logrus"
)
log := logrus.New()
log.SetFormatter(&nested.Formatter{
	HideKeys:    true,
	FieldsOrder: []string{"component", "category"},
})
log.Info("just info message")
// Output: Jan _2 15:04:05.000 [INFO] just info message
log.WithField("component", "rest").Warn("warn message")
// Output: Jan _2 15:04:05.000 [WARN] [rest] warn message