How to Call Only Parent Method with child Handle

SystemVerilog
5

In reply to cgales:

The code which you have shown above-:

initial begin
    my_ext_class = new();  line1
    my_ext_class.display(); line2
    my_base_class = my_ext_class; line3 // Assign the extended class handle to the base class handle line4 
    my_base_class.display(); line5
  end

Line2 will display “inside extended class”
Line5 - either you write line3 or not, my_base_class will always display “inside base”.

I want to call base method(ie inside base) using my_ext_class handle , how it is possible is my question ?