Scriptrunner created story add epic link

[Ramaiah Pendli]

import com.atlassian.jira.component.ComponentAccessor

import com.atlassian.jira.model.ChangeGroup

import com.atlassian.jira.model.ChangeItem

import com.atlassian.jira.issue.history.ChangeItemBean

import com.atlassian.jira.component.ComponentAccessor

import com.atlassian.jira.issue.context.IssueContext

import com.atlassian.jira.issue.context.IssueContextImpl

import com.atlassian.jira.issue.fields.config.manager.PrioritySchemeManager

import com.atlassian.jira.issue.IssueManager;

import com.atlassian.jira.issue.MutableIssue;

import com.atlassian.jira.issue.ModifiedValue

import com.atlassian.jira.issue.util.DefaultIssueChangeHolder

def customFieldManager = ComponentAccessor.getCustomFieldManager()

def cField = customFieldManager.getCustomFieldObject("customfield_10113")

def cFieldValue = issue.getCustomFieldValue(cField)

IssueManager im = ComponentAccessor.getIssueManager();

MutableIssue currentIssue = im.getIssueObject(issue.key) as MutableIssue;

def java.lang.String originalSummary = currentIssue.getSummary();

def java.lang.String originalDesc = currentIssue.getDescription()

//Epic Link

def epiclinkKey = currentIssue.key

//this gets the newest value of the custom field 'FieldName'

def newValue = cFieldValue.toString()

def changeHistoryManager = ComponentAccessor.getChangeHistoryManager()

def changeItems = changeHistoryManager.getChangeItemsForField(issue,'Impacted Projects')

//if field has no change history, this returns false

if (changeItems){

//this gets the previous value of the field

def lastValue = changeItems.last().getFromString()

if((lastValue.contains("Project B")))

{

    //return lastValue

    // the project key under which the issue will get created

    final projectKey = 'PB'

    // the issue type for the new issue

    final issueTypeName = 'Story'

    // user with that user key will be the reporter of the issue

    final reporterKey = 'jira'

    final priorityName = 'Major'

    def issueService = ComponentAccessor.issueService

    def constantsManager = ComponentAccessor.constantsManager

    def loggedInUser = ComponentAccessor.jiraAuthenticationContext.loggedInUser

    def prioritySchemeManager = ComponentAccessor.getComponent(PrioritySchemeManager)

    def project = ComponentAccessor.projectManager.getProjectObjByKey(projectKey)

    assert project : "Could not find project with key $projectKey"

    def issueType = constantsManager.allIssueTypeObjects.findByName(issueTypeName)

    assert issueType : "Could not find issue type with name $issueTypeName"

    // if we cannot find user with the specified key or this is null, then set as a  reporter the logged in user

    def reporter = ComponentAccessor.userManager.getUserByKey(reporterKey) ?: loggedInUser

    // if we cannot find the priority with the given name or if this is null, then set the default priority

    def issueContext = new IssueContextImpl(project, issueType) as IssueContext

    def priorityId = constantsManager.priorities.findByName(priorityName)?.id ?: prioritySchemeManager.getDefaultOption(issueContext)

    def issueInputParameters = issueService.newIssueInputParameters().with {

        setProjectId(project.id)

        setIssueTypeId(issueType.id)

        setReporterId(reporter.name)

        setSummary(originalSummary)

        setDescription(originalDesc)

        setPriorityId(priorityId)

    }

    def validationResult = issueService.validateCreate(loggedInUser, issueInputParameters)

    assert validationResult.valid : validationResult.errorCollection

    def result = issueService.create(loggedInUser, validationResult)

    assert result.valid : result.errorCollection

    //def issue = event.issue

    //def epicLink = customFieldManager.getCustomFieldObjectByName("Epic Link")

    //epicLink.updateValue(null, issue, new ModifiedValue(issue.getCustomFieldValue(epicLink), epiclinkKey),new DefaultIssueChangeHolder())

}

}

else{

return false

}

Can you let me know how to add epic link to the newly created story based on epic custom field value update 

Method setCustomfieldvalue not found in latest version