public boolean canChangeRevisionAt(Instant instant) {
        return changeBlockers.stream().filter(DeploymentSpec.ChangeBlocker::blocksRevisions)
                             .noneMatch(block -> block.window().includes(instant));
    }
Returns whether an application revision change for these instances can occur at the given instant
config-model-api/src/main/java/com/yahoo/config/application/api/DeploymentInstanceSpec.java