Passing Property Value From TestCase To Request.txt

import groovy.json.JsonSlurper
import com.eviware.soapui.support.types.StringToStringMap 

// Get property value from the TestCase
def testCaseProperty = testRunner.testCase.getPropertyValue( "fromProperty" )
log.info testCaseProperty

// Set property value to the request header property
def headers = new StringToStringMap()
 headers.put("toProperty", testCaseProperty);
 testRunner.testCase.testSteps["Request1"].getHttpRequest().setRequestHeaders(headers)