Apache TinkerPop (incubating)
Copyright 2015-2016 The Apache Software Foundation.

This product includes software developed at
The Apache Software Foundation (http://www.apache.org/).

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Activiti
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Activiti BPM Platform
Copyright 2010-2014 Alfresco Software, Ltd.

gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphml/GraphMLWriterHelper.java
contains DelegatingXMLStreamWriter.java and IndentingXMLStreamWriter.java from
modules/activiti-bpmn-converter/src/main/java/org/activiti/bpmn/converter/