diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index d639c80f07..32e4442732 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -59,6 +59,8 @@
       <module name="node_integrationTest" target="1.8" />
       <module name="node_main" target="1.8" />
       <module name="node_test" target="1.8" />
+      <module name="quasar-hook_main" target="1.8" />
+      <module name="quasar-hook_test" target="1.8" />
       <module name="raft-notary-demo_main" target="1.8" />
       <module name="raft-notary-demo_test" target="1.8" />
       <module name="rpc_integrationTest" target="1.8" />
diff --git a/core/src/main/kotlin/net/corda/flows/CollectSignaturesFlow.kt b/core/src/main/kotlin/net/corda/flows/CollectSignaturesFlow.kt
index 531841381a..d718251c74 100644
--- a/core/src/main/kotlin/net/corda/flows/CollectSignaturesFlow.kt
+++ b/core/src/main/kotlin/net/corda/flows/CollectSignaturesFlow.kt
@@ -25,8 +25,6 @@ import java.security.PublicKey
  * **WARNING**: This flow ONLY works with [ServiceHub.legalIdentityKey]s and WILL break if used with randomly generated
  * keys by the [ServiceHub.keyManagementService].
  *
- * **IMPORTANT** This flow NEEDS to be called with the 'shareParentSessions" parameter of [subFlow] set to true.
- *
  * Usage:
  *
  * - Call the [CollectSignaturesFlow] flow as a [subFlow] and pass it a [SignedTransaction] which has at least been
@@ -58,9 +56,7 @@ import java.security.PublicKey
  *     val stx = subFlow(CollectSignaturesFlow(ptx))
  *
  * @param partiallySignedTx Transaction to collect the remaining signatures for
- *
  */
-
 // TODO: AbstractStateReplacementFlow needs updating to use this flow.
 // TODO: TwoPartyTradeFlow needs updating to use this flow.
 // TODO: Update this flow to handle randomly generated keys when that works is complete.
@@ -149,11 +145,11 @@ class CollectSignaturesFlow(val partiallySignedTx: SignedTransaction,
  *
  * - Subclass [SignTransactionFlow] - this can be done inside an existing flow (as shown below)
  * - Override the [checkTransaction] method to add some custom verification logic
- * - Call the flow via subFlow with "shareParentSessions" set to true
+ * - Call the flow via [FlowLogic.subFlow]
  * - The flow returns the fully signed transaction once it has been committed to the ledger
  *
- * Example - checking and signing a transaction involving a [DummyContract], see CollectSignaturesFlowTests.Kt for
- * further examples:
+ * Example - checking and signing a transaction involving a [net.corda.core.contracts.DummyContract], see
+ * CollectSignaturesFlowTests.kt for further examples:
  *
  *     class Responder(val otherParty: Party): FlowLogic<SignedTransaction>() {
  *          @Suspendable override fun call(): SignedTransaction {
@@ -167,14 +163,13 @@ class CollectSignaturesFlow(val partiallySignedTx: SignedTransaction,
  *              }
  *
  *              // Invoke the subFlow, in response to the counterparty calling [CollectSignaturesFlow].
- *              val stx = subFlow(flow, shareParentSessions = true)
+ *              val stx = subFlow(flow)
  *
  *              return waitForLedgerCommit(stx.id)
  *          }
  *      }
  *
  * @param otherParty The counter-party which is providing you a transaction to sign.
- *
  */
 abstract class SignTransactionFlow(val otherParty: Party,
                                    override val progressTracker: ProgressTracker = tracker()) : FlowLogic<SignedTransaction>() {
@@ -224,7 +219,7 @@ abstract class SignTransactionFlow(val otherParty: Party,
     }
 
     /**
-     * The [CheckTransaction] method allows the caller of this flow to provide some additional checks over the proposed
+     * The [checkTransaction] method allows the caller of this flow to provide some additional checks over the proposed
      * transaction received from the counter-party. For example:
      *
      * - Ensuring that the transaction you are receiving is the transaction you *EXPECT* to receive. I.e. is has the
diff --git a/node/build.gradle b/node/build.gradle
index f6ca57406d..ad3926adf7 100644
--- a/node/build.gradle
+++ b/node/build.gradle
@@ -151,7 +151,7 @@ dependencies {
     compile "io.requery:requery-kotlin:$requery_version"
 
     // FastClasspathScanner: classpath scanning
-    compile 'io.github.lukehutch:fast-classpath-scanner:2.0.19'
+    compile 'io.github.lukehutch:fast-classpath-scanner:2.0.20'
 
     // Integration test helpers
     integrationTestCompile "junit:junit:$junit_version"
diff --git a/node/src/main/kotlin/net/corda/node/internal/AbstractNode.kt b/node/src/main/kotlin/net/corda/node/internal/AbstractNode.kt
index 7c8ffea39d..0986ad7017 100644
--- a/node/src/main/kotlin/net/corda/node/internal/AbstractNode.kt
+++ b/node/src/main/kotlin/net/corda/node/internal/AbstractNode.kt
@@ -6,7 +6,6 @@ import com.google.common.util.concurrent.ListenableFuture
 import com.google.common.util.concurrent.MoreExecutors
 import com.google.common.util.concurrent.SettableFuture
 import io.github.lukehutch.fastclasspathscanner.FastClasspathScanner
-import io.github.lukehutch.fastclasspathscanner.scanner.ClassInfo
 import net.corda.core.*
 import net.corda.core.crypto.*
 import net.corda.core.flows.FlowInitiator
@@ -352,12 +351,8 @@ abstract class AbstractNode(open val configuration: NodeConfiguration,
             }
         }
 
-        val classpathURLsField = ClassInfo::class.java.getDeclaredField("classpathElementURLs").apply { isAccessible = true }
-
         flowClasses.groupBy {
-            val classInfo = scanResult.classNameToClassInfo[it.name]
-            @Suppress("UNCHECKED_CAST")
-            (classpathURLsField.get(classInfo) as Set<URL>).first()
+            scanResult.classNameToClassInfo[it.name]!!.classpathElementURLs.first()
         }.forEach { url, classes ->
             log.info("Found flows in plugin ${url.pluginName()}: ${classes.joinToString { it.name }}")
         }