component.setValue("ForcedInstallation", ...) doesn't work

I have two components which conflicts with each other.
However, one of them should be installed.

For instance, I want to make an installer contains both of binaries for 32bit and 64bit.
I can make only one visible following 'System Information Example'.
In that example, the visible component can be deselected by user but this is not desirable because one of them should be installed.
To enfoce filtered(visible) component to be installed, I've tried to setValue("ForcedInstallation", true) in component script but it does not change anything.

Because there's no mention about ForcedInstallation in documentation, I assumed this is a bug and report here.