func (m *logMux) Add(s Sink) {
	m.sinks = append(m.sinks, s)
}
/*
Add a sink. TODO(silversupreme): Write this comment better.
package log
import (
	"fmt"
)
type logMux struct {
	sinks     []Sink
	debugMode bool
}
func NewMux() *logMux {
	return &logMux{
		debugMode: false,
	}
}