Block Queued Job Plugin
org.jenkinsci.plugins.blockqueuedjob.condition.BlockQueueCondition in block-queued-job
Abstract class for block/unblock conditions
Implementations:
Block Queued Job Plugin: org.jenkinsci.plugins.blockqueuedjob.condition.BuildingBlockQueueCondition (view on GitHub)
Block Queued Job Plugin: org.jenkinsci.plugins.blockqueuedjob.condition.JobResultBlockQueueCondition (view on GitHub)
GitHub Integration Plugin: org.jenkinsci.plugins.github.pullrequest.extra.GitHubPRLabelUnblockQueueCondition (view on GitHub)