return (DXFLayer) layers.get(DXFConstants.DEFAULT_LAYER); }
if (this.layers.containsKey(DXFConstants.DEFAULT_LAYER)) { return (DXFLayer) layers.get(DXFConstants.DEFAULT_LAYER); } else { DXFLayer layer = new DXFLayer(); layer.setName(DXFConstants.DEFAULT_LAYER); this.addDXFLayer(layer); return layer; } }
    public DXFLayer getDXFLayer(String key) {        if (layers.containsKey(key)) {            return (DXFLayer) layers.get(key);        }        // retun the default layer        return (DXFLayer) layers.get(DXFConstants.DEFAULT_LAYER);    }