repository/src/main/java/org/apache/atlas/repository/graph/DeleteHandler.java [360:381]:
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                            elements.removeAll(Collections.singletonList(elementEdge.getId().toString()));
                            GraphHelper.setProperty(outVertex, propertyName, elements);
                            break;

                        }
                    }
                }
            }
            break;

        case MAP:
            //If its map attribute, find the right edge between two vertices and update map property
            List<String> keys = GraphHelper.getListProperty(outVertex, propertyName);
            if (keys != null) {
                keys = new ArrayList<>(keys);   //Make a copy, else list.remove reflects on titan.getProperty()
                for (String key : keys) {
                    String keyPropertyName = GraphHelper.getQualifiedNameForMapKey(propertyName, key);
                    String mapEdgeId = GraphHelper.getSingleValuedProperty(outVertex, keyPropertyName, String.class);
                    AtlasEdge mapEdge = graphHelper.getEdgeByEdgeId(outVertex, keyPropertyName, mapEdgeId);
                    if(mapEdge != null) {
                        AtlasVertex mapVertex = mapEdge.getInVertex();
                        if (mapVertex.getId().toString().equals(inVertex.getId().toString())) {
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repository/src/main/java/org/apache/atlas/repository/store/graph/v1/DeleteHandlerV1.java [491:512]:
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                            elements.removeAll(Collections.singletonList(elementEdge.getId().toString()));
                            GraphHelper.setProperty(outVertex, propertyName, elements);
                            break;

                        }
                    }
                }
            }
            break;

        case MAP:
            //If its map attribute, find the right edge between two vertices and update map property
            List<String> keys = GraphHelper.getListProperty(outVertex, propertyName);
            if (keys != null) {
                keys = new ArrayList<>(keys);   //Make a copy, else list.remove reflects on titan.getProperty()
                for (String key : keys) {
                    String keyPropertyName = GraphHelper.getQualifiedNameForMapKey(propertyName, key);
                    String mapEdgeId = GraphHelper.getSingleValuedProperty(outVertex, keyPropertyName, String.class);
                    AtlasEdge mapEdge = graphHelper.getEdgeByEdgeId(outVertex, keyPropertyName, mapEdgeId);
                    if(mapEdge != null) {
                        AtlasVertex mapVertex = mapEdge.getInVertex();
                        if (mapVertex.getId().toString().equals(inVertex.getId().toString())) {
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