diff --git a/playground/nutech/spiff-example-1/call_activity.bpmn b/playground/nutech/spiff-example-1/call_activity.bpmn
index 0c12320d..8e326f10 100644
--- a/playground/nutech/spiff-example-1/call_activity.bpmn
+++ b/playground/nutech/spiff-example-1/call_activity.bpmn
@@ -1,6 +1,6 @@
 <?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" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" xmlns:spiffworkflow="http://spiffworkflow.org/bpmn/schema/1.0/core" xmlns:camunda="http://camunda.org/schema/1.0/bpmn" xmlns:modeler="http://camunda.org/schema/modeler/1.0" id="Definitions_0ibnyhd" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="4.11.1" modeler:executionPlatform="Camunda Platform" modeler:executionPlatformVersion="7.15.0">
-  <bpmn:process id="receipt" isExecutable="false">
+  <bpmn:process id="process_model" isExecutable="false">
     <bpmn:exclusiveGateway id="Gateway_0ocn7fn" name="Is Color Customizable?" default="Flow_1h8w6f7">
       <bpmn:incoming>Flow_104dmrv</bpmn:incoming>
       <bpmn:outgoing>Flow_0ikn93z</bpmn:outgoing>
@@ -88,79 +88,7 @@
     </bpmn:userTask>
   </bpmn:process>
   <bpmndi:BPMNDiagram id="BPMNDiagram_1">
-    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="receipt">
-      <bpmndi:BPMNEdge id="Flow_0uy2bcm_di" bpmnElement="Flow_0uy2bcm">
-        <di:waypoint x="1020" y="290" />
-        <di:waypoint x="1120" y="290" />
-        <di:waypoint x="1120" y="247" />
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_043j5w0_di" bpmnElement="Flow_043j5w0">
-        <di:waypoint x="870" y="232" />
-        <di:waypoint x="870" y="290" />
-        <di:waypoint x="920" y="290" />
-        <bpmndi:BPMNLabel>
-          <dc:Bounds x="876" y="258" width="19" height="14" />
-        </bpmndi:BPMNLabel>
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_1gj4orb_di" bpmnElement="Flow_1gj4orb">
-        <di:waypoint x="1170" y="207" />
-        <di:waypoint x="1232" y="207" />
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_1y8t5or_di" bpmnElement="Flow_1y8t5or">
-        <di:waypoint x="810" y="120" />
-        <di:waypoint x="870" y="120" />
-        <di:waypoint x="870" y="182" />
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_0apn5fw_di" bpmnElement="Flow_0apn5fw">
-        <di:waypoint x="640" y="182" />
-        <di:waypoint x="640" y="120" />
-        <di:waypoint x="710" y="120" />
-        <bpmndi:BPMNLabel>
-          <dc:Bounds x="646" y="148" width="19" height="14" />
-        </bpmndi:BPMNLabel>
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_1r5bppm_di" bpmnElement="Flow_1r5bppm">
-        <di:waypoint x="895" y="207" />
-        <di:waypoint x="1070" y="207" />
-        <bpmndi:BPMNLabel>
-          <dc:Bounds x="1012" y="189" width="15" height="14" />
-        </bpmndi:BPMNLabel>
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_16qjxga_di" bpmnElement="Flow_16qjxga">
-        <di:waypoint x="590" y="290" />
-        <di:waypoint x="640" y="290" />
-        <di:waypoint x="640" y="232" />
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_0b4pvj2_di" bpmnElement="Flow_0b4pvj2">
-        <di:waypoint x="665" y="207" />
-        <di:waypoint x="845" y="207" />
-        <bpmndi:BPMNLabel>
-          <dc:Bounds x="748" y="189" width="15" height="14" />
-        </bpmndi:BPMNLabel>
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_06gb1zr_di" bpmnElement="Flow_06gb1zr">
-        <di:waypoint x="205" y="207" />
-        <di:waypoint x="260" y="207" />
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_1h8w6f7_di" bpmnElement="Flow_1h8w6f7">
-        <di:waypoint x="465" y="207" />
-        <di:waypoint x="615" y="207" />
-        <bpmndi:BPMNLabel>
-          <dc:Bounds x="532" y="183" width="15" height="14" />
-        </bpmndi:BPMNLabel>
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_104dmrv_di" bpmnElement="Flow_104dmrv">
-        <di:waypoint x="360" y="207" />
-        <di:waypoint x="415" y="207" />
-      </bpmndi:BPMNEdge>
-      <bpmndi:BPMNEdge id="Flow_0ikn93z_di" bpmnElement="Flow_0ikn93z">
-        <di:waypoint x="440" y="232" />
-        <di:waypoint x="440" y="290" />
-        <di:waypoint x="490" y="290" />
-        <bpmndi:BPMNLabel>
-          <dc:Bounds x="446" y="257" width="19" height="14" />
-        </bpmndi:BPMNLabel>
-      </bpmndi:BPMNEdge>
+    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="process_model">
       <bpmndi:BPMNShape id="Gateway_0ocn7fn_di" bpmnElement="Gateway_0ocn7fn" isMarkerVisible="true">
         <dc:Bounds x="415" y="182" width="50" height="50" />
         <bpmndi:BPMNLabel>
@@ -206,6 +134,78 @@
       <bpmndi:BPMNShape id="Activity_0clnuqi_di" bpmnElement="Activity_1mkqpod">
         <dc:Bounds x="920" y="250" width="100" height="80" />
       </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_0ikn93z_di" bpmnElement="Flow_0ikn93z">
+        <di:waypoint x="440" y="232" />
+        <di:waypoint x="440" y="290" />
+        <di:waypoint x="490" y="290" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="446" y="257" width="19" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_104dmrv_di" bpmnElement="Flow_104dmrv">
+        <di:waypoint x="360" y="207" />
+        <di:waypoint x="415" y="207" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1h8w6f7_di" bpmnElement="Flow_1h8w6f7">
+        <di:waypoint x="465" y="207" />
+        <di:waypoint x="615" y="207" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="532" y="183" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_06gb1zr_di" bpmnElement="Flow_06gb1zr">
+        <di:waypoint x="205" y="207" />
+        <di:waypoint x="260" y="207" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0b4pvj2_di" bpmnElement="Flow_0b4pvj2">
+        <di:waypoint x="665" y="207" />
+        <di:waypoint x="845" y="207" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="748" y="189" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_16qjxga_di" bpmnElement="Flow_16qjxga">
+        <di:waypoint x="590" y="290" />
+        <di:waypoint x="640" y="290" />
+        <di:waypoint x="640" y="232" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1r5bppm_di" bpmnElement="Flow_1r5bppm">
+        <di:waypoint x="895" y="207" />
+        <di:waypoint x="1070" y="207" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1012" y="189" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0apn5fw_di" bpmnElement="Flow_0apn5fw">
+        <di:waypoint x="640" y="182" />
+        <di:waypoint x="640" y="120" />
+        <di:waypoint x="710" y="120" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="646" y="148" width="19" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1y8t5or_di" bpmnElement="Flow_1y8t5or">
+        <di:waypoint x="810" y="120" />
+        <di:waypoint x="870" y="120" />
+        <di:waypoint x="870" y="182" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1gj4orb_di" bpmnElement="Flow_1gj4orb">
+        <di:waypoint x="1170" y="207" />
+        <di:waypoint x="1232" y="207" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_043j5w0_di" bpmnElement="Flow_043j5w0">
+        <di:waypoint x="870" y="232" />
+        <di:waypoint x="870" y="290" />
+        <di:waypoint x="920" y="290" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="876" y="258" width="19" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0uy2bcm_di" bpmnElement="Flow_0uy2bcm">
+        <di:waypoint x="1020" y="290" />
+        <di:waypoint x="1120" y="290" />
+        <di:waypoint x="1120" y="247" />
+      </bpmndi:BPMNEdge>
     </bpmndi:BPMNPlane>
   </bpmndi:BPMNDiagram>
 </bpmn:definitions>