def manager = gradle.services.get($BuildOperationListenerManager.name)
            def listener = new $BuildOperationListener.name() {
                void started($BuildOperationDescriptor.name buildOperation, $OperationStartEvent.name startEvent) {
                    logger.lifecycle "started operation"
                }

import java.util.LinkedList;
import java.util.concurrent.Executor;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;

class DefaultBuildOperationQueue<T extends BuildOperation> implements BuildOperationQueue<T> {
    private enum QueueState {
        Working, Finishing, Cancelled, Done
    }

    private final boolean allowAccessToProjectState;

    /**
     * Asserts that the events form a typical tree of operations for a build.
     */
    void assertIsABuild() {
        assertHasSingleTree()

        def root = operations[0]
        assert root.buildOperation
        assert root.descriptor.displayName == 'Run build'
    }

    boolean isEmpty() {
        assertHasZeroOrMoreTrees()
        return events.empty
    }

    /**

                public ListenerService() {
                    println('onInstantiated')
                }

                // Shouldn't be called
                void started($BuildOperationDescriptor.name buildOperation, $OperationStartEvent.name startEvent) {
                    println('onStarted')
                }

                // Shouldn't be called