func NewDatadogBackend(endpoint, namespace string, tags []string) (Backend, error) {
	client, err := statsd.New(endpoint)
	if err != nil {
		return nil, err
	}
	client.Namespace = namespace
	client.Tags = tags
	return &datadogBackend{
		client: client,
	}, nil
}
NewDatadogBackend instantiates a new datadog/statsd connection. When running
in containers at shopify, the endpoint should generally be "localhost:8125".

`namespace` is an optional prefix to be prepended to every metric submitted.
It should end with a period to separate it from the metric name.

`tags` is a set of tags that will be included with every metric submitted.
package statsd
import (
	"context"
	"time"
	"github.com/DataDog/datadog-go/statsd"
)