How do I import SoapUIProTestcaseRunner and/or SoapUIPro.SoapUIProCore?

I am trying to call SoapUI from Java, wanting to run certain test cases with certain properties and then be able to determine what failed where (get a report).
I see examples here: https://support.smartbear.com/readyapi/docs/testing/integrations/junit.html

Question about SoapUIProTestcaseRunner.
The API documentation (https://soapui.org/apidocs/pro/com/eviware/soapui/SoapUIProTestCaseRunner.html#_ga=2.190358571.1641777942.1494498010-1195040155.1434438474) does not seem to be in any of the Jars.

The example has an import:
import com.smartbear.ready.cmd.runner.pro.SoapUIProTestCaseRunner;

But this class does not have the runTestCase method (for example) - so the reference and the example seem to be at odds with each other.

Where do I import SoapUIPro.SoapUIProCore from (which may or may not be helpful)?

I need the import statement and which Jar file is it in?
The API documentation suggests com.eviware.soapui.SoapUIPro.SoapUIProCore, but I can't find this in any of the Jars delivered with ReadyAPI.