my $x = SubClass->new;  # inherits from SuperClass

$x->method;  # calls SubClass::method
{
  # save the glob...
  local *old = *{ ref($x) . "::method" };

  # localize the glob...
  local *{ ref($x) . "::method" };

  # and restore everything else
  ${ ref($x) . "::method" } = $old;
  @{ ref($x) . "::method" } = @old;
  %{ ref($x) . "::method" } = %old;
  # technically incomplete
  
  $x->method;  # calls SuperClass::method
}
$x->method;  # calls SubClass::method