[#64] object: move package from neofs-api-go

Also, remove deprecated method.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

object/splitinfo.go

@@ -0,0 +1,66 @@
+package object
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/v2/object"
+)
+
+type SplitInfo object.SplitInfo
+
+// NewSplitInfoFromV2 wraps v2 SplitInfo message to SplitInfo.
+//
+// Nil object.SplitInfo converts to nil.
+func NewSplitInfoFromV2(v2 *object.SplitInfo) *SplitInfo {
+	return (*SplitInfo)(v2)
+}
+
+// NewSplitInfo creates and initializes blank SplitInfo.
+//
+// Defaults:
+//  - splitID: nil;
+//  - lastPart nil;
+//  - link: nil.
+func NewSplitInfo() *SplitInfo {
+	return NewSplitInfoFromV2(new(object.SplitInfo))
+}
+
+// ToV2 converts SplitInfo to v2 SplitInfo message.
+//
+// Nil SplitInfo converts to nil.
+func (s *SplitInfo) ToV2() *object.SplitInfo {
+	return (*object.SplitInfo)(s)
+}
+
+func (s *SplitInfo) SplitID() *SplitID {
+	return NewSplitIDFromV2(
+		(*object.SplitInfo)(s).GetSplitID())
+}
+
+func (s *SplitInfo) SetSplitID(v *SplitID) {
+	(*object.SplitInfo)(s).SetSplitID(v.ToV2())
+}
+
+func (s *SplitInfo) LastPart() *ID {
+	return NewIDFromV2(
+		(*object.SplitInfo)(s).GetLastPart())
+}
+
+func (s *SplitInfo) SetLastPart(v *ID) {
+	(*object.SplitInfo)(s).SetLastPart(v.ToV2())
+}
+
+func (s *SplitInfo) Link() *ID {
+	return NewIDFromV2(
+		(*object.SplitInfo)(s).GetLink())
+}
+
+func (s *SplitInfo) SetLink(v *ID) {
+	(*object.SplitInfo)(s).SetLink(v.ToV2())
+}
+
+func (s *SplitInfo) Marshal() ([]byte, error) {
+	return (*object.SplitInfo)(s).StableMarshal(nil)
+}
+
+func (s *SplitInfo) Unmarshal(data []byte) error {
+	return (*object.SplitInfo)(s).Unmarshal(data)
+}