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
* <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for the containment reference '<em>Insets</em>'.
	 * @see org.eclipse.birt.chart.model.layout.ClientArea#getInsets()
	 * @see #getClientArea()
	 * @generated
	 */
	EReference getClientArea_Insets( );
	/**
	 * Returns the meta object for class '{@link org.eclipse.birt.chart.model.layout.LabelBlock <em>Label Block</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for class '<em>Label Block</em>'.
	 * @see org.eclipse.birt.chart.model.layout.LabelBlock
	 * @generated
	 */
	EClass getLabelBlock( );
	/**
	 * Returns the meta object for the containment reference '{@link org.eclipse.birt.chart.model.layout.LabelBlock#getLabel <em>Label</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for the containment reference '<em>Label</em>'.
	 * @see org.eclipse.birt.chart.model.layout.LabelBlock#getLabel()
	 * @see #getLabelBlock()
	 * @generated
	 */
	EReference getLabelBlock_Label( );
	/**
	 * Returns the meta object for class '{@link org.eclipse.birt.chart.model.layout.Legend <em>Legend</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for class '<em>Legend</em>'.
	 * @see org.eclipse.birt.chart.model.layout.Legend
	 * @generated