title: How to create a link to issue in Jira API?
body: <p>I need to create programmatically a link of type "relates to" from one issue to another.
  I've found a method </p>
  
  <pre><code>createIssueLink(Long sourceIssueId, Long destinationIssueId, Long issueLinkTypeId, Long sequence, User remoteUser) 
  </code></pre>
  
  <p>in IssueLinkManager, but I can't find anyway to get the issueLinkTypeId. 
  Can anybody help me with that?</p>