import com.atlassian.jira.component.ComponentAccessor
final alertIssueType = 'Alert'
final linkNamesForIncident = ['Problem/Incident']
ComponentAccessor.issueLinkManager
.getOutwardLinks(issue.id)
.findAll { it.issueLinkType.name in linkNamesForIncident && it.destinationObject.issueType.name == alertIssueType }
.size()