What is the alternative of deprecated methods of BulkEditBean.java in Jira 8

There are many methods which have been deprecated in Jira 8.
Such as initSelectedIssues(Collection)

Due to which, we are stuck to use the functionality of BulkEditBean.java’s functionality.
Can you help to provide any alternative of these methods?

As we are looking to migrate Issues by using BulkEditBean.java, kindly provide if there is any alternative way to migrate issues?