diff --git a/playground/dan/sending-messages/send_message.bpmn b/playground/dan/sending-messages/send_message.bpmn
index 09305388..88564647 100644
--- a/playground/dan/sending-messages/send_message.bpmn
+++ b/playground/dan/sending-messages/send_message.bpmn
@@ -1,7 +1,69 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" id="Definitions_96f6665" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="3.0.0-dev">
-  <bpmn:process id="Process_1n9q1jh" />
+<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:spiffworkflow="http://spiffworkflow.org/bpmn/schema/1.0/core" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" id="Definitions_96f6665" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="3.0.0-dev">
+  <bpmn:collaboration id="Collaboration_0q2lqil">
+    <bpmn:participant id="Participant_12vvqgj" processRef="Process_1n9q1jh" />
+    <bpmn:correlationKey name="dog">
+      <bpmn:correlationPropertyRef>name</bpmn:correlationPropertyRef>
+    </bpmn:correlationKey>
+  </bpmn:collaboration>
+  <bpmn:process id="Process_1n9q1jh">
+    <bpmn:startEvent id="Event_014xsa5">
+      <bpmn:outgoing>Flow_0sm4aob</bpmn:outgoing>
+    </bpmn:startEvent>
+    <bpmn:intermediateThrowEvent id="Event_0ohgqmw">
+      <bpmn:incoming>Flow_0t63umu</bpmn:incoming>
+      <bpmn:outgoing>Flow_1q2tmls</bpmn:outgoing>
+    </bpmn:intermediateThrowEvent>
+    <bpmn:endEvent id="Event_1o9247a">
+      <bpmn:incoming>Flow_1q2tmls</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:sendTask id="Activity_1ub6535" messageRef="Message_1szmvmb">
+      <bpmn:incoming>Flow_0sm4aob</bpmn:incoming>
+      <bpmn:outgoing>Flow_0t63umu</bpmn:outgoing>
+    </bpmn:sendTask>
+    <bpmn:sequenceFlow id="Flow_0sm4aob" sourceRef="Event_014xsa5" targetRef="Activity_1ub6535" />
+    <bpmn:sequenceFlow id="Flow_0t63umu" sourceRef="Activity_1ub6535" targetRef="Event_0ohgqmw" />
+    <bpmn:sequenceFlow id="Flow_1q2tmls" sourceRef="Event_0ohgqmw" targetRef="Event_1o9247a" />
+  </bpmn:process>
+  <bpmn:correlationProperty id="name" name="name">
+    <bpmn:correlationPropertyRetrievalExpression messageRef="Message_1szmvmb">
+      <bpmn:formalExpression>name</bpmn:formalExpression>
+    </bpmn:correlationPropertyRetrievalExpression>
+  </bpmn:correlationProperty>
+  <bpmn:message id="Message_1szmvmb" name="fetch">
+    <bpmn:extensionElements>
+      <spiffworkflow:messagePayload>{"name": "Fido"}</spiffworkflow:messagePayload>
+    </bpmn:extensionElements>
+  </bpmn:message>
   <bpmndi:BPMNDiagram id="BPMNDiagram_1">
-    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_1n9q1jh" />
+    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Collaboration_0q2lqil">
+      <bpmndi:BPMNShape id="Participant_12vvqgj_di" bpmnElement="Participant_12vvqgj" isHorizontal="true">
+        <dc:Bounds x="-370" y="-260" width="600" height="120" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_014xsa5_di" bpmnElement="Event_014xsa5">
+        <dc:Bounds x="-278" y="-218" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_0ohgqmw_di" bpmnElement="Event_0ohgqmw">
+        <dc:Bounds x="-38" y="-218" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_1o9247a_di" bpmnElement="Event_1o9247a">
+        <dc:Bounds x="52" y="-218" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0rqqqvu_di" bpmnElement="Activity_1ub6535">
+        <dc:Bounds x="-190" y="-240" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_0sm4aob_di" bpmnElement="Flow_0sm4aob">
+        <di:waypoint x="-242" y="-200" />
+        <di:waypoint x="-190" y="-200" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0t63umu_di" bpmnElement="Flow_0t63umu">
+        <di:waypoint x="-90" y="-200" />
+        <di:waypoint x="-38" y="-200" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1q2tmls_di" bpmnElement="Flow_1q2tmls">
+        <di:waypoint x="-2" y="-200" />
+        <di:waypoint x="52" y="-200" />
+      </bpmndi:BPMNEdge>
+    </bpmndi:BPMNPlane>
   </bpmndi:BPMNDiagram>
 </bpmn:definitions>