spec.instant.child2Started
                        spec.thread.block()
                        spec.instant.child2Finished
                    }
                })
            })
            outer.leaseFinish()
        }

        then:
        instant.child2Started > instant.child1Finished || instant.child1Started > instant.child2Finished

        cleanup:

                        instant.child1Started
                        thread.blockUntil.child2Started
                    })
                })
            }
            start {
                operationRunner.run(runnableBuildOperation("<parent-2>") {
                    operationRunner.run(runnableBuildOperation("<child-2>") {
                        instant.child2Started