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/model/layout/LayoutPackage.java
* @generated
	 */
	EClass getPlot( );
	/**
	 * Returns the meta object for the attribute '{@link org.eclipse.birt.chart.model.layout.Plot#getHorizontalSpacing <em>Horizontal Spacing</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for the attribute '<em>Horizontal Spacing</em>'.
	 * @see org.eclipse.birt.chart.model.layout.Plot#getHorizontalSpacing()
	 * @see #getPlot()
	 * @generated
	 */
	EAttribute getPlot_HorizontalSpacing( );
	/**
	 * Returns the meta object for the attribute '{@link org.eclipse.birt.chart.model.layout.Plot#getVerticalSpacing <em>Vertical Spacing</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for the attribute '<em>Vertical Spacing</em>'.
	 * @see org.eclipse.birt.chart.model.layout.Plot#getVerticalSpacing()
	 * @see #getPlot()
	 * @generated
	 */
	EAttribute getPlot_VerticalSpacing( );
	/**
	 * Returns the meta object for the containment reference '{@link org.eclipse.birt.chart.model.layout.Plot#getClientArea <em>Client Area</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for the containment reference '<em>Client Area</em>'.
	 * @see org.eclipse.birt.chart.model.layout.Plot#getClientArea()
	 * @see #getPlot()
	 * @generated
	 */
	EReference getPlot_ClientArea( );