What architecture styles are used in SoapUI software?

Good day,

me and my team from Slovak University of Technology, Faculty of Informatics and Information Technologies are working

on deeper analysis of SoapUI software. Mainly we would like to know what architecture styles are applied  in this software and in which parts of code or software modules are they located. In general we would like to know as much as possible about architecture styles applied in SoapUI. Most of these informations we did not found on web.

Could you give us helping hand and provide us more informations please?

Thanks in advance for your help,

Mark B.