Import postman collections to SoapUi

As this is apparently open source, I would consider stepping through this code to see whether it's practical to fix. It's not clear exactly what open source components are in play here. I noticed both https://github.com/SmartBear/soapui and https://github.com/SmartBear/readyapi-postman-plugin . I don't see any sign in the soapui code of any way to import Postman collections (I've looked at a couple of different branches, including "release-5.7.2"). The plugin seems it could be where it's done, but I don't understand how that is integrated into soapui, and that is apparently for "Ready API", not the open source SoapUI. The plugin docs refer to an "Integrations" tab in SoapUI, which I don't see in 5.7.2.