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
{
			final int iCount = aax.getOverlayCount( ) + 2;
			final OneAxis[] oaxa = new OneAxis[iCount];
			oaxa[0] = aax.getPrimaryBase( );
			oaxa[1] = aax.getPrimaryOrthogonal( );
			for ( int i = 0; i < iCount - 2; i++ )
			{
				oaxa[i + 2] = aax.getOverlay( i );
			}
			
			for ( int i = 0; i < iCount; i++ )
			{
				IAxesDecorator iad = getAxesDecorator( oaxa[i] );
				if ( iad != null )
				{
					iad.decorateAxes( ipr, srh, oaxa[i] );
				}
			}
		}
	}
	/**
	 * Returns the decorator renderer associated with current series, default is
	 * none.
	 */
	public IAxesDecorator getAxesDecorator( OneAxis ax )
	{
		return null;
	}
	/**
	 * Convenient routine to render a marker