My target is to hide Move and Convert if current issue have linked issue(s) with type equal, for example, "SomeIssueType".
I suppose to use "Hide system or plugin UI element" in Script Fragments.
Hide what:
com.atlassian.jira.plugin.system.issueoperations:move-issue
But what is conditions in this case? A la "issue.links... != 'SomeIssueType'" ?