Can't find paystatus in sales transaction API

[Mosmania]

Is it possible to set a paystatus in the sales transaction API?
<transaction action="changepaystatus"> <office>001</office> <code>SLS</code> <number>201300001</number> <paystatus>N</paystatus> </transaction>

I can't find the setter.

[willemstuursma]

Of course, can you provide a PR?

[praveenmgopinathan]

Of course, can you provide a PR?
Dear Willem, can you please help me with this;

"Is it possible to set a paystatus in the sales transaction API?
001 SLS 201300001 N

I can't find the setter."

I would like to know the valid values and details for changing pay status

thank you!