storage/tsdb/tsdb.go
func (a adapter) Appender() (storage.Appender, error) {
	return appender{a: a.db.Appender()}, nil
}
func (a adapter) Appender() (storage.Appender, error) {
	return appender{a: a.db.Appender()}, nil
}
func ( a adapter ) Appender ( ) ( storage . Appender , error ) { return appender { a : a . db . Appender ( ) } , nil }
// Appender returns a new appender against the storage.
Appender returns a new appender against the storage .