How to fix syntax error on Groovy Jira post function containing it.label

[Norm Goering]

In preparation for a Jira upgrade from 6.4.13 to 7.0.11, I am trying to remove all deprecation and error messages displayed in the post function groovy scripts, as recommended by ScriptRunner vendor Adaptavist.  The Script Runner plugin is being upgraded after the Jira upgrade from 4.1.3.24 to 5.1.6.2.

I am seeing this error in the 5.1.6.2 version of Script Runner in Jira 7.0.11:

[Static Type Checking] No Such Property: label for class:  java.lang.Object

This is for it.label on the else if line of code.  What do I need to do to make that line of code compliant with the syntax checking?  

Code:

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.util.JiraUtils
import com.atlassian.jira.workflow.WorkflowTransitionUtil
import com.atlassian.jira.workflow.WorkflowTransitionUtilImpl

import java.io.FileInputStream
import java.util.Properties

def log = org.apache.log4j.Category.getInstance('com.onresolve.jira.groovy.PostFunction')
log.setLevel(org.apache.log4j.Level.DEBUG)

def config = new Properties()
def configFile = new File("/usr/local/jira_app/scripts/config/${transientVars['pkey']}.properties")

config.load(new FileInputStream(configFile))

def customFieldManager = ComponentAccessor.getCustomFieldManager()

def applicableStepsField = customFieldManager.getCustomFieldObjectByName(config.getProperty('fields.steps'))
def applicableSteps = issue.getCustomFieldValue(applicableStepsField)

def actionId = transientVars['actionId']
def step = config.getProperty("actions.${actionId}.step")
def skipTo = config.getProperty("actions.${actionId}.skipTo")

if (!step || !skipTo) {
log.error("#skipUpgradeActionNotConfigured actionId: ${actionId}, step: ${step}, skipTo: ${skipTo}")
} else if (!applicableSteps?.any() { it.label == config.getProperty("steps.${step}") }) {
log.info("Skipping ${step} and transitioning to ${skipTo} on action ${actionId} for upgrade order ${issue}")

def workflowTransitionUtil = (WorkflowTransitionUtil) JiraUtils.loadComponent(WorkflowTransitionUtilImpl.class)

workflowTransitionUtil.setIssue(issue)
workflowTransitionUtil.setUserkey(config.getProperty('user'))
workflowTransitionUtil.setAction(config.getProperty("transitions.${skipTo}").toInteger())
workflowTransitionUtil.validate()
workflowTransitionUtil.progress()
}