Deprecated CoroutineScope.coroutineContext which is replaced with
top-level function from stdlib.
diff --git a/core/kotlinx-coroutines-core/src/test/kotlin/guide/example-sync-06.kt b/core/kotlinx-coroutines-core/src/test/kotlin/guide/example-sync-06.kt
index 73fe116..73702dd 100644
--- a/core/kotlinx-coroutines-core/src/test/kotlin/guide/example-sync-06.kt
+++ b/core/kotlinx-coroutines-core/src/test/kotlin/guide/example-sync-06.kt
@@ -18,10 +18,9 @@
package guide.sync.example06
import kotlinx.coroutines.experimental.*
-import kotlin.coroutines.experimental.CoroutineContext
-import kotlin.system.measureTimeMillis
-import kotlinx.coroutines.experimental.sync.Mutex
-import kotlinx.coroutines.experimental.sync.withLock
+import kotlinx.coroutines.experimental.sync.*
+import kotlin.system.*
+import kotlin.coroutines.experimental.*
suspend fun massiveRun(context: CoroutineContext, action: suspend () -> Unit) {
val n = 1000 // number of coroutines to launch