Bug 161383 Support page-break-inside property on report item
Need support page-break-inside property on report items
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ElementDefn.java
void setSelector( String value )
	{
		selector = value;
	}
	/**
	 * Sets the "extends" attribute.
	 * 
	 * @param base
	 *            The name of the element type which this element extends.
	 */
	void setExtends( String base )
	{
		assert !isBuilt;
		extendsFrom = base;
	}
	/**
	 * Sets the "supports user properties" attribute.
	 * 
	 * @param flag
	 *            True if the element allows user-defined properties, false
	 *            otherwise.
	 */
	void setSupportsUserProperties( boolean flag )
	{
		assert !isBuilt;
		supportsUserProperties = flag;
	}
	/**
	 * Gets the name of the parent element, if any. The parent element is the
	 * one that this element extends.