How to use result of test step in next step

How does the response look like? Sample would help to understand.

Of course, one can read the response of any test step(s) in groovy step

import com.eviware.soapui.impl.wsdl.teststeps.*

// Get the gRPC request test step - change if the step name is different
def grpcStep = testRunner.testCase.getTestStepByName("gRPC Request")

// Get the gRPC response message
def grpcResponse = grpcStep.testRequest.responseContent

// Parse the response message as a byte array
def responseBytes = grpcResponse.getBytes()

// Deserialize the response message using Protocol Buffers
def responseMessage = MyProtoMessage.parseFrom(responseBytes)

// Print the response message
log.info "Response message: $responseMessage"