func (ims *IdentityMappings) String() string {
	mappings := ""
	for idx, mapping := range ims.list {
		mappings += mapping.String()
		if idx < len(ims.list)-1 {
			mappings += ", "
		}
	}
	return fmt.Sprintf("IdentityMappings [%s]", mappings)
}
String converts a list of identity mappings into a human-readable string.
package natplugin
import (
	"fmt"
	"net"
	"github.com/contiv/vpp/plugins/service/renderer"
)
type IdentityMappings struct {
	list []*IdentityMapping
}
type IdentityMapping struct {
	IP       net.IP
	Port     uint16
	Protocol renderer.ProtocolType
	VrfID    uint32
}