[#104] object: Add getters for PatchRequestBodyPatch

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

object/types.go

@@ -1615,6 +1615,22 @@ func (r *PatchResponse) SetBody(v *PatchResponseBody) {
 	r.Body = v
 }
 
+func (r *PatchRequestBodyPatch) GetChunk() []byte {
+	if r != nil {
+		return r.Chunk
+	}
+
+	return nil
+}
+
+func (r *PatchRequestBodyPatch) GetRange() *Range {
+	if r != nil {
+		return r.Range
+	}
+
+	return nil
+}
+
 func (s *ECInfo) getObjectPart() {}
 
 func (s *ECInfo) getHeaderPart() {}