I would like to have access to the dialog for parameters of two replaceable models M1 (x,y,z) and M2 (u,v) but as they are defined in an upper model SYS, the dialogs are not visibles

package TwoLevelParameter
  model M1
    parameter Real x;
    parameter Real y;
    parameter Real z;
    Real R;
  equation
    R = x + y + z;
  end M1;
 
   model M2
    parameter Real u;
    parameter Real v;
    Real R;
  equation
    R = u * v;
  end M2;
 
model SYS
  replaceable M1 m annotation(
    choices(choice(redeclare M1 m "Default"),
     choice(redeclare M2 m "Variant")));
end SYS;
 
 

  model Essai
  M1 m1(x = 1, y = 2, z = 3)  annotation(
      Placement(visible = true, transformation(origin = {-58, 54}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  M2 m2(u = 2.3, v = 5.)  annotation(
      Placement(visible = true, transformation(origin = {36, 50}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  SYS sys annotation(
      Placement(visible = true, transformation(origin = {-26, -8}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  equation

  end Essai;

end TwoLevelParameter;