diff --git a/playground/rmgi/complex/4parallel.bpmn b/playground/rmgi/complex/4parallel.bpmn
new file mode 100644
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+++ b/playground/rmgi/complex/4parallel.bpmn
@@ -0,0 +1,159 @@
+<?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:spiffworkflow="http://spiffworkflow.org/bpmn/schema/1.0/core" 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:process id="Process_u1akxnt" isExecutable="true">
+    <bpmn:startEvent id="StartEvent_1">
+      <bpmn:outgoing>Flow_0tsnlov</bpmn:outgoing>
+    </bpmn:startEvent>
+    <bpmn:serviceTask id="Activity_1t9wn35">
+      <bpmn:extensionElements>
+        <spiffworkflow:serviceTaskOperator id="http/GetRequest" resultVariable="response">
+          <spiffworkflow:parameters>
+            <spiffworkflow:parameter id="url" type="str" value="&#34;http://example/com&#34;" />
+            <spiffworkflow:parameter id="headers" type="any" />
+            <spiffworkflow:parameter id="params" type="any" />
+            <spiffworkflow:parameter id="basic_auth_username" type="str" />
+            <spiffworkflow:parameter id="basic_auth_password" type="str" />
+          </spiffworkflow:parameters>
+        </spiffworkflow:serviceTaskOperator>
+      </bpmn:extensionElements>
+      <bpmn:incoming>Flow_006aniu</bpmn:incoming>
+      <bpmn:outgoing>Flow_0maxq7h</bpmn:outgoing>
+    </bpmn:serviceTask>
+    <bpmn:sequenceFlow id="Flow_0tsnlov" sourceRef="StartEvent_1" targetRef="Gateway_1ntem3m" />
+    <bpmn:sequenceFlow id="Flow_006aniu" sourceRef="Gateway_1ntem3m" targetRef="Activity_1t9wn35" />
+    <bpmn:parallelGateway id="Gateway_1ntem3m">
+      <bpmn:incoming>Flow_0tsnlov</bpmn:incoming>
+      <bpmn:outgoing>Flow_006aniu</bpmn:outgoing>
+      <bpmn:outgoing>Flow_0qnaaj0</bpmn:outgoing>
+      <bpmn:outgoing>Flow_0fledz4</bpmn:outgoing>
+      <bpmn:outgoing>Flow_0q0sv07</bpmn:outgoing>
+    </bpmn:parallelGateway>
+    <bpmn:serviceTask id="Activity_0cg3bgm">
+      <bpmn:extensionElements>
+        <spiffworkflow:serviceTaskOperator id="http/GetRequest" resultVariable="response2">
+          <spiffworkflow:parameters>
+            <spiffworkflow:parameter id="url" type="str" value="&#34;http://example/com&#34;" />
+            <spiffworkflow:parameter id="headers" type="any" />
+            <spiffworkflow:parameter id="params" type="any" />
+            <spiffworkflow:parameter id="basic_auth_username" type="str" />
+            <spiffworkflow:parameter id="basic_auth_password" type="str" />
+          </spiffworkflow:parameters>
+        </spiffworkflow:serviceTaskOperator>
+      </bpmn:extensionElements>
+      <bpmn:incoming>Flow_0qnaaj0</bpmn:incoming>
+      <bpmn:outgoing>Flow_0u65uem</bpmn:outgoing>
+    </bpmn:serviceTask>
+    <bpmn:sequenceFlow id="Flow_0qnaaj0" sourceRef="Gateway_1ntem3m" targetRef="Activity_0cg3bgm" />
+    <bpmn:serviceTask id="Activity_1c6f83c">
+      <bpmn:extensionElements>
+        <spiffworkflow:serviceTaskOperator id="http/GetRequest" resultVariable="response3">
+          <spiffworkflow:parameters>
+            <spiffworkflow:parameter id="url" type="str" value="&#34;http://example/com&#34;" />
+            <spiffworkflow:parameter id="headers" type="any" />
+            <spiffworkflow:parameter id="params" type="any" />
+            <spiffworkflow:parameter id="basic_auth_username" type="str" />
+            <spiffworkflow:parameter id="basic_auth_password" type="str" />
+          </spiffworkflow:parameters>
+        </spiffworkflow:serviceTaskOperator>
+      </bpmn:extensionElements>
+      <bpmn:incoming>Flow_0fledz4</bpmn:incoming>
+      <bpmn:outgoing>Flow_0k2h756</bpmn:outgoing>
+    </bpmn:serviceTask>
+    <bpmn:sequenceFlow id="Flow_0fledz4" sourceRef="Gateway_1ntem3m" targetRef="Activity_1c6f83c" />
+    <bpmn:serviceTask id="Activity_1q0ftl7">
+      <bpmn:extensionElements>
+        <spiffworkflow:serviceTaskOperator id="http/GetRequest" resultVariable="response4">
+          <spiffworkflow:parameters>
+            <spiffworkflow:parameter id="url" type="str" value="&#34;http://example/com&#34;" />
+            <spiffworkflow:parameter id="headers" type="any" />
+            <spiffworkflow:parameter id="params" type="any" />
+            <spiffworkflow:parameter id="basic_auth_username" type="str" />
+            <spiffworkflow:parameter id="basic_auth_password" type="str" />
+          </spiffworkflow:parameters>
+        </spiffworkflow:serviceTaskOperator>
+      </bpmn:extensionElements>
+      <bpmn:incoming>Flow_0q0sv07</bpmn:incoming>
+      <bpmn:outgoing>Flow_13vzep9</bpmn:outgoing>
+    </bpmn:serviceTask>
+    <bpmn:sequenceFlow id="Flow_0q0sv07" sourceRef="Gateway_1ntem3m" targetRef="Activity_1q0ftl7" />
+    <bpmn:parallelGateway id="Gateway_02atous">
+      <bpmn:incoming>Flow_0maxq7h</bpmn:incoming>
+      <bpmn:incoming>Flow_0u65uem</bpmn:incoming>
+      <bpmn:incoming>Flow_0k2h756</bpmn:incoming>
+      <bpmn:incoming>Flow_13vzep9</bpmn:incoming>
+    </bpmn:parallelGateway>
+    <bpmn:sequenceFlow id="Flow_0maxq7h" sourceRef="Activity_1t9wn35" targetRef="Gateway_02atous" />
+    <bpmn:sequenceFlow id="Flow_0u65uem" sourceRef="Activity_0cg3bgm" targetRef="Gateway_02atous" />
+    <bpmn:sequenceFlow id="Flow_0k2h756" sourceRef="Activity_1c6f83c" targetRef="Gateway_02atous" />
+    <bpmn:sequenceFlow id="Flow_13vzep9" sourceRef="Activity_1q0ftl7" targetRef="Gateway_02atous" />
+  </bpmn:process>
+  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
+    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_u1akxnt">
+      <bpmndi:BPMNShape id="Activity_1ulfr7s_di" bpmnElement="Activity_1t9wn35">
+        <dc:Bounds x="480" y="30" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="BPMNShape_0xwxdkx" bpmnElement="Activity_0cg3bgm">
+        <dc:Bounds x="480" y="137" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="BPMNShape_0llabnr" bpmnElement="Activity_1c6f83c">
+        <dc:Bounds x="480" y="260" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="BPMNShape_1nrchgm" bpmnElement="Activity_1q0ftl7">
+        <dc:Bounds x="480" y="380" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="BPMNShape_0jcjb1h" bpmnElement="Gateway_02atous">
+        <dc:Bounds x="755" y="215" width="50" height="50" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Gateway_0069igl_di" bpmnElement="Gateway_1ntem3m">
+        <dc:Bounds x="285" y="215" width="50" height="50" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="_BPMNShape_StartEvent_2" bpmnElement="StartEvent_1">
+        <dc:Bounds x="132" y="222" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_0tsnlov_di" bpmnElement="Flow_0tsnlov">
+        <di:waypoint x="168" y="240" />
+        <di:waypoint x="285" y="240" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_006aniu_di" bpmnElement="Flow_006aniu">
+        <di:waypoint x="310" y="215" />
+        <di:waypoint x="310" y="70" />
+        <di:waypoint x="480" y="70" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0qnaaj0_di" bpmnElement="Flow_0qnaaj0">
+        <di:waypoint x="310" y="215" />
+        <di:waypoint x="310" y="177" />
+        <di:waypoint x="480" y="177" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0fledz4_di" bpmnElement="Flow_0fledz4">
+        <di:waypoint x="310" y="265" />
+        <di:waypoint x="310" y="300" />
+        <di:waypoint x="480" y="300" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0q0sv07_di" bpmnElement="Flow_0q0sv07">
+        <di:waypoint x="310" y="265" />
+        <di:waypoint x="310" y="440" />
+        <di:waypoint x="480" y="440" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0maxq7h_di" bpmnElement="Flow_0maxq7h">
+        <di:waypoint x="580" y="70" />
+        <di:waypoint x="780" y="70" />
+        <di:waypoint x="780" y="215" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0u65uem_di" bpmnElement="Flow_0u65uem">
+        <di:waypoint x="580" y="177" />
+        <di:waypoint x="780" y="177" />
+        <di:waypoint x="780" y="215" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0k2h756_di" bpmnElement="Flow_0k2h756">
+        <di:waypoint x="580" y="300" />
+        <di:waypoint x="780" y="300" />
+        <di:waypoint x="780" y="265" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_13vzep9_di" bpmnElement="Flow_13vzep9">
+        <di:waypoint x="580" y="420" />
+        <di:waypoint x="780" y="420" />
+        <di:waypoint x="780" y="265" />
+      </bpmndi:BPMNEdge>
+    </bpmndi:BPMNPlane>
+  </bpmndi:BPMNDiagram>
+</bpmn:definitions>