How to use StopAndDrain method of internal Package

...94				break SUITE_LOOP95			}96			suites[suiteIdx] = suite97			if r.interruptHandler.Status().Interrupted {98				opc.StopAndDrain()99				break OUTER_LOOP100			}101			if suites[suiteIdx].State.Is(internal.TestSuiteStateSkippedDueToEmptyCompilation) {102				fmt.Printf("Skipping %s (no test files)\n", suite.Path)103				continue SUITE_LOOP104			}105			if suites[suiteIdx].State.Is(internal.TestSuiteStateFailedToCompile) {106				fmt.Println(suites[suiteIdx].CompilationError.Error())107				if !r.cliConfig.KeepGoing {108					opc.StopAndDrain()109				}110				continue SUITE_LOOP111			}112			if suites.CountWithState(internal.TestSuiteStateFailureStates...) > 0 && !r.cliConfig.KeepGoing {113				suites[suiteIdx].State = internal.TestSuiteStateSkippedDueToPriorFailures114				opc.StopAndDrain()115				continue SUITE_LOOP116			}117			if !endTime.IsZero() {118				r.suiteConfig.Timeout = endTime.Sub(time.Now())119				if r.suiteConfig.Timeout <= 0 {120					suites[suiteIdx].State = internal.TestSuiteStateFailedDueToTimeout121					opc.StopAndDrain()122					continue SUITE_LOOP123				}124			}125			suites[suiteIdx] = internal.RunCompiledSuite(suites[suiteIdx], r.suiteConfig, r.reporterConfig, r.cliConfig, r.goFlagsConfig, additionalArgs)126		}127		if suites.CountWithState(internal.TestSuiteStateFailureStates...) > 0 {128			if iteration > 0 {129				fmt.Printf("\nTests failed on attempt #%d\n\n", iteration+1)130			}131			break OUTER_LOOP132		}133		if r.cliConfig.UntilItFails {134			fmt.Printf("\nAll tests passed...\nWill keep running them until they fail.\nThis was attempt #%d\n%s\n", iteration+1, orcMessage(iteration+1))135		} else if r.cliConfig.Repeat > 0 && iteration < r.cliConfig.Repeat {...