This validator controls if count of selected Fix Version does not exceed the specified count.
It is possible to specify the limit of selected Fix Version.
When specified, the selection of these resolutions will require a comment.
The Validator configuration may be done in XML in Workflow descriptor as follow :
<validators> <validator name="" type="class"> <arg name="selectedCount">1</arg> <arg name="class.name">com.atlassian.jira.workflow.validator.FixVersionSelectionValidator</arg> </validator> </validators>