Applying Bai-Perron Test to Time Series data structured in panel format

Hello,
I have a panel dataset where data is there for each country. I want to run the stata command for each country.

https://www.wiwiss.fu-berlin.de/fach...G_V02_Main.pdf
In this paper, the author has developed a Stata package "sbbpm".

The syntax is:
sbbpm depvar timevar, [minspan(#) maxbreaks(#) alpha(#) trimming(#) het(string) prewhit(#) method(string)]

I tried to run the synatx for each country using if condition like:
sbbpm depvar timevar, [minspan(#) maxbreaks(#) alpha(#) trimming(#) het(string) prewhit(#) method(string)] if id==1
but it does not allow if.

I'm wondering if can be done some local or global looping...
would highly appreciate your help...