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/ClientArea.java
* @generated
	 */
	LineAttributes getOutline( );
	/**
	 * Sets the value of the '{@link org.eclipse.birt.chart.model.layout.ClientArea#getOutline <em>Outline</em>}' containment reference.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @param value the new value of the '<em>Outline</em>' containment reference.
	 * @see #getOutline()
	 * @generated
	 */
	void setOutline( LineAttributes value );
	/**
	 * Returns the value of the '<em><b>Shadow Color</b></em>' containment reference. <!-- begin-user-doc --> Gets
	 * the shadow color of the client area. If this is not specified, the client area will not have a shadow. <!--
	 * end-user-doc --> <!-- begin-model-doc -->
	 * 
	 * Specifies the shadow color for the client area.
	 * 
	 * <!-- end-model-doc -->
	 * 
	 * @return the value of the '<em>Shadow Color</em>' containment reference.
	 * @see #setShadowColor(ColorDefinition)
	 * @see org.eclipse.birt.chart.model.layout.LayoutPackage#getClientArea_ShadowColor()
	 * @model containment="true" resolveProxies="false" required="true"
	 * @generated
	 */
	ColorDefinition getShadowColor( );
	/**
	 * Sets the value of the '{@link org.eclipse.birt.chart.model.layout.ClientArea#getShadowColor <em>Shadow Color</em>}' containment reference.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->