diff --git a/pool/tree/pool.go b/pool/tree/pool.go
index 3b0ff1a..0d7c117 100644
--- a/pool/tree/pool.go
+++ b/pool/tree/pool.go
@@ -360,7 +360,7 @@ func (p *Pool) GetNodes(ctx context.Context, prm GetNodesParams) ([]*grpcService
 		// Empty result is expected due to delayed tree service sync.
 		// Return an error there to trigger retry and ignore it after,
 		// to keep compatibility with 'GetNodeByPath' implementation.
-		if inErr == nil && len(resp.Body.Nodes) == 0 {
+		if inErr == nil && len(resp.GetBody().GetNodes()) == 0 {
 			return errNodeEmptyResult
 		}
 		return handleError("failed to get node by path", inErr)
@@ -389,7 +389,7 @@ func (x *SubTreeReader) Read(buf []*grpcService.GetSubTreeResponse_Body) (int, e
 		} else if err != nil {
 			return i, handleError("failed to get sub tree", err)
 		}
-		buf[i] = resp.Body
+		buf[i] = resp.GetBody()
 	}
 
 	return len(buf), nil
@@ -405,7 +405,7 @@ func (x *SubTreeReader) ReadAll() ([]*grpcService.GetSubTreeResponse_Body, error
 		} else if err != nil {
 			return nil, handleError("failed to get sub tree", err)
 		}
-		res = append(res, resp.Body)
+		res = append(res, resp.GetBody())
 	}
 
 	return res, nil
@@ -421,7 +421,7 @@ func (x *SubTreeReader) Next() (*grpcService.GetSubTreeResponse_Body, error) {
 		return nil, handleError("failed to get sub tree", err)
 	}
 
-	return resp.Body, nil
+	return resp.GetBody(), nil
 }
 
 // GetSubTree invokes eponymous method from TreeServiceClient.
@@ -535,12 +535,12 @@ func (p *Pool) AddNodeByPath(ctx context.Context, prm AddNodeByPathParams) (uint
 	body := resp.GetBody()
 	if body == nil {
 		return 0, errors.New("nil body in tree service response")
-	} else if len(body.Nodes) == 0 {
+	} else if len(body.GetNodes()) == 0 {
 		return 0, errors.New("empty list of added nodes in tree service response")
 	}
 
 	// The first node is the leaf that we add, according to tree service docs.
-	return body.Nodes[0], nil
+	return body.GetNodes()[0], nil
 }
 
 // MoveNode invokes eponymous method from TreeServiceClient.