Postman Complete Task from API

Thanks for your help I looked at Completing a User task with Java API
but I am new to Java and don’t quite understand everything yet. Below is what I have tried so far and am getting

No signature of method: org.camunda.bpm.engine.impl.ProcessEngineImpl.call() is applicable for argument types: () values: []

def varNames = runtimeService.getVariables(it.executionId)
String requestId = varNames.requestId
String pidm = varNames.pidm
String taskId = ‘a76bb7f7-1220-11eb-b309-0800271e8913’
if (requestId != null && pidm != null) {
def advisorApprovalCheck = approvalMySqlService.advisorApprovalCheck(requestId, pidm)
if(advisorApprovalCheck != null) {
def advisorComplete = processEngine()
.setVariable (“advisorApproval”, advisorApprovalCheck.advisorDecision)
.complete(taskId)
}
}