func WriteProtoDelimited(w io.Writer, p *dto.MetricFamily) (int, error) {
	return ext.WriteDelimited(w, p)
}
WriteProtoDelimited writes the MetricFamily to the writer in delimited
protobuf format and returns the number of bytes written and any error
encountered.
package text
import (
	"fmt"
	"io"
	"code.google.com/p/goprotobuf/proto"
	"github.com/matttproud/golang_protobuf_extensions/ext"
	dto "github.com/prometheus/client_model/go"
)