if ( provider instanceof MapPropertyDescriptorProvider ) this.provider = (MapPropertyDescriptorProvider) provider;
if ( provider instanceof MapDescriptorProvider ) this.provider = (MapDescriptorProvider) provider;
	public void setDescriptorProvider( IDescriptorProvider provider )	{		super.setDescriptorProvider( provider );		if ( provider instanceof MapPropertyDescriptorProvider )			this.provider = (MapPropertyDescriptorProvider) provider;	}