Add v2 version to go module name

Replace all elements from `v2` to root directory.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

storagegroup/types.go

@@ -0,0 +1,83 @@
+package storagegroup
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/v2/refs"
+)
+
+// StorageGroup is a unified structure of StorageGroup
+// message from proto definition.
+type StorageGroup struct {
+	size uint64
+
+	hash *refs.Checksum
+
+	exp uint64
+
+	members []*refs.ObjectID
+}
+
+// GetValidationDataSize of unified storage group structure.
+func (s *StorageGroup) GetValidationDataSize() uint64 {
+	if s != nil {
+		return s.size
+	}
+
+	return 0
+}
+
+// SetValidationDataSize into unified storage group structure.
+func (s *StorageGroup) SetValidationDataSize(v uint64) {
+	if s != nil {
+		s.size = v
+	}
+}
+
+// GetValidationHash of unified storage group structure.
+func (s *StorageGroup) GetValidationHash() *refs.Checksum {
+	if s != nil {
+		return s.hash
+	}
+
+	return nil
+}
+
+// SetValidationHash into unified storage group structure.
+func (s *StorageGroup) SetValidationHash(v *refs.Checksum) {
+	if s != nil {
+		s.hash = v
+	}
+}
+
+// GetExpirationEpoch of unified storage group structure.
+func (s *StorageGroup) GetExpirationEpoch() uint64 {
+	if s != nil {
+		return s.exp
+	}
+
+	return 0
+}
+
+// SetExpirationEpoch into unified storage group structure.
+func (s *StorageGroup) SetExpirationEpoch(v uint64) {
+	if s != nil {
+		s.exp = v
+	}
+}
+
+// GetMembers of unified storage group structure. Members are objects of
+// storage group.
+func (s *StorageGroup) GetMembers() []*refs.ObjectID {
+	if s != nil {
+		return s.members
+	}
+
+	return nil
+}
+
+// SetMembers into unified storage group structure. Members are objects of
+// storage group.
+func (s *StorageGroup) SetMembers(v []*refs.ObjectID) {
+	if s != nil {
+		s.members = v
+	}
+}