Make access to properties protected (accessible to children).

+mgen/MgGeoLine2Point.m

 classdef MgGeoLine2Point < mgen.MgGeoLine
     % A 2-point line of the geometry
 
-    properties (Access = private)
+    properties (Access = protected)
         geoPoints = mgen.MgGeoPoint.empty(0,2);
         gridNodes = mgen.MgGridNode.empty(0,0);
 
@@ -156,7 +156,6 @@ classdef MgGeoLine2Point < mgen.MgGeoLine
 
                 run_id = run_id + 1;
             end
-
         end
 
         function gp = getGeoPoints(self)