func (s *Session) String() string {
	return string(s.Bytes())
}
String returns the encoded session description as string.
package sdp
import (
	"strings"
	"time"
)
const ContentType = "application/sdp"
type Session struct {
	Version     int           
	Origin      *Origin       
	Name        string        
	Information string        
	URI         string        
	Email       []string      
	Phone       []string      
	Connection  *Connection   
	Bandwidth   []*Bandwidth  
	TimeZone    []*TimeZone   
	Key         []*Key        
	Timing      *Timing       
	Repeat      []*Repeat     
	Attributes  Attributes    
	Mode        string        
	Media       []*Media      
}