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## Consequences

* Classes are forced to have consistent nullability annotations.
* IDE warnings become more accurate, reducing warnings fatigue.
* Public API nullability annotations become closer to reality.
* Java compilation of Gradle code suffers from small performance penalty (up to 10%).
* Time has to be allocated to clean up existing projects.
* One has to write NullAway-conformant code even when hacking.

    private
    val daemonPids = ConcurrentHashMap.newKeySet<String>()

    private
    val logger = Logging.getLogger(DaemonTracker::class.java)

    override fun close() {
        logger.lifecycle("Cleaning up daemons...")
        cleanUpDaemons()
    }

    fun newDaemonListener() =
        object : TestListener {
            override fun beforeTest(test: TestDescriptor) = Unit

labels: [ "a:bug", "to-triage" ]
assignees: [ ]
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        Please follow the instructions below.
        We receive dozens of issues every week, so to stay productive, we will close issues that don't provide enough information.

        If you need help with Gradle or have a usage question, please reach [our community](http://help.gradle.org/) instead of creating an issue.

t.find("input.bootstrap-timepicker-second").val():"")+(this.showMeridian?this.$widget.find("input.bootstrap-timepicker-meridian").val():"");this.setTime(a,!0)}},widgetClick:function(b){b.stopPropagation(),b.preventDefault();var c=a(b.target),d=c.closest("a").data("action");d&&this[d](),this.update(),c.is("input")&&c.get(0).setSelectionRange(0,2)},widgetKeydown:function(b){var c=a(b.target),d=c.attr("class").replace("bootstrap-timepicker-","");switch(b.which){case 9:if(b.shiftKey){if("hour"===d)return...

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                        indexUpdater.addFinishedSessionId(sid);
                        try {
                            crawler.close();
                        } catch (final Exception e) {
                            logger.warn("Failed to close the crawler.", e);
                        }
                    }
                    if (!Constants.DONE.equals(crawlerStatusList.get(i))) {

        Without this, daemon may keep writing to project dir after the test finishes, resulting in errors like:

        org.junit.platform.commons.JUnitException: Failed to close extension context
	        at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	        at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)

    private
    fun getExecutedTaskPaths(projectPath: String) = projectPathToExecutedTaskPaths.getOrEmpty(projectPath)

    override fun close() {
        val projectPathToLeftoverFiles = mutableMapOf<String, LeftoverFiles>()
        // First run: delete any temporary directories used to extract resources from jars
        projectStates.values.forEach { projectState ->