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    java.lang.NullPointerException
        at org.activiti.designer.features.MoveActivityFeature.moveBoundaryEvents(MoveActivityFeature.java:139)
        at org.activiti.designer.features.MoveActivityFeature.moveActivityChilds(MoveActivityFeature.java:118)
        at org.activiti.designer.features.MoveActivityFeature.postMoveShape(MoveActivityFeature.java:62)
        at org.eclipse.graphiti.features.impl.DefaultMoveShapeFeature.moveShape(DefaultMoveShapeFeature.java:67)
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