[SOLVED] SystemVerilog virtual methods

class Transaction;
  ...
  some attributes
  ...
  virtual function calc_something();
    ...
    calculating something
    ...
  endfunction
  ...
endclass

class BadTransaction extends Transaction;
  ...
  some other attributes
  ...
  function calc_something();
    ...
    calculate something
    ...
  endfunction
  ...
endclass

Transaction tr;
BadTransaction badTr;
initial begin
  // case 1
  tr = new();
  tr.calc_something();  // Calls Transaction::calc_something

  // case 2
  badTr = new();
  badTr.calc_something(); // Calls BadTransaction::calc_something

  // case 3
  tr = badTr; // base handle points extended object
  tr.calc_something(); // What method will be called, the one from Transaction class or the one from BadTransaction?
end