func NewGroup(items []Item) Group {
	return &groupImpl{Itms: items}
}
NewGroup creates a new Group
package pgresolver
import (
	"fmt"
	"reflect"
	sdkApi "github.com/hyperledger/fabric-sdk-go/api/apifabclient"
	"github.com/pkg/errors"
)
func NewGroupOfGroups(groups []Group) GroupOfGroups {
	items := make([]Item, len(groups))
	for i, g := range groups {
		items[i] = g
	}
	return &groupsImpl{groupImpl: groupImpl{Itms: items}}
}