Creating REST testStep using groovy

Hi,

I am using SaouUI Pro and I'd like to create a testStep (fro REST) using groovy script only. Could you help me please ?

I tried this script found in the Online help to do so and still not working:

import com.eviware.soapui.impl.wsdl.WsdlInterface
myInterface = (WsdlInterface) testRunner.testCase.testSuite.project.getInterfaceByName("My_API")
myOperation = myInterface.getOperationByName("My_Method")
myRequest = myOperation.getRequestByName("Request 1")

Thanks in advance for your help.