Bug 156497 [Regression][Acceptance]Report isn't refreshed when delete used library file.
Description: Report isn't refreshed when delete used library file. Steps to reproduce: 1.New a library, add a label, input actuate. 2.New a report, extend lib.label 3.Delete the library file. 4.Refresh the report in Outline of the report Expected result: Empty label in Layout. Actual result: label with content "actuate" in Layout.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
return null;
	}
	/**
	 * Gets all the defined property bindings for the given element. Each one in
	 * the list is instance of <code>PropertyBinding</code>.
	 * 
	 * @param element
	 *            the element to find
	 * @return the property binding list defined for the element
	 */
	public List getPropertyBindings( DesignElement element )
	{
		if ( element == null )
			return Collections.EMPTY_LIST;
		List propertyBindings = getListProperty( this, PROPERTY_BINDINGS_PROP );
		if ( propertyBindings == null )
			return Collections.EMPTY_LIST;
		List result = new ArrayList( );
		for ( int i = 0; i < propertyBindings.size( ); i++ )
		{
			PropertyBinding propBinding = (PropertyBinding) propertyBindings
					.get( i );
			BigDecimal id = propBinding.getID( );
			if ( id != null && getElementByID( id.longValue( ) ) == element )
				result.add( propBinding );
		}
		return result;
	}
	/**
	 * Checks the name of the embedded image in this report. If duplicate, get a