Bug 207268 Add visibility option for plot within axes
For chart with axes, we should make plot within axes invisible. Meantime, other plots, such as axes, legend and title, should be visible. This enhancement doesn't include UI change, and it is required for cross tab integration.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/AxesRenderer.java
* @throws RenderingException
	 */
	public final void renderEachAxis( IPrimitiveRenderer ipr, Plot pl,
			OneAxis ax, int iWhatToDraw ) throws ChartException
	{
		new AxesRenderHelper( this, ipr, pl, ax, iWhatToDraw ).renderEachAxis( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.render.BaseRenderer#set(org.eclipse.birt.chart.model.Chart,
	 *      java.lang.Object, org.eclipse.birt.chart.model.component.Series,
	 *      org.eclipse.birt.chart.model.component.Axis,
	 *      org.eclipse.birt.chart.model.data.SeriesDefinition)
	 */
	public void set( Chart _cm, Object _o, Series _se, Axis _ax,
			SeriesDefinition _sd )
	{
		super.set( _cm, _o, _se, _sd );
		ax = _ax; 
	}
	/**
	 * Returns if its a 3D rendering.
	 * 
	 */
	public final boolean isDimension3D( )
	{
		return ( getModel( ).getDimension( ) == ChartDimension.THREE_DIMENSIONAL_LITERAL );
	}
	/**