Bug 211773 Legend entries overlap
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
ar.set( cm, oComputations, null, null, null );
		ar.set( rtc );
		brna[0] = ar;
		return brna;
	}
	/**
	 * This method returns appropriate renders for the given chart model. It
	 * uses extension points to identify a renderer corresponding to a custom
	 * series.
	 * 
	 * @param cm
	 * @param rtc
	 * @param oComputations
	 * 
	 * @return
	 * @throws ChartException
	 */
	public static final BaseRenderer[] instances( Chart cm, RunTimeContext rtc,
			Object oComputations ) throws ChartException
	{
		final PluginSettings ps = PluginSettings.instance( );
		BaseRenderer[] brna = null;
		final boolean bPaletteByCategory = ( cm.getLegend( )
				.getItemType( )
				.getValue( ) == LegendItemType.CATEGORIES );
		if ( cm instanceof ChartWithAxes )
		{
			final ChartWithAxes cwa = (ChartWithAxes) cm;
			final Axis[] axa = cwa.getPrimaryBaseAxes( );
			Axis axPrimaryBase = axa[0];