ontrolling_displayed_columns
	- \ref access_mode
	- \ref observer_widget_searching
	.
- \ref advanced_topics
	- \ref widget_meta_types
	- \ref saving_state
	- \ref models_overview
	.
  
</td>

<td style="width:20%; vertical-align: top; margin:0px 0px 0px 0px;">
<table style="table-layout:auto;
	margin:0px 0px 0px 0px; 
  width: 100%;
	border-width:0px 0px 0px 0px; 
	border-color:#7F7F7F;
  background-color: #d1d3d4;">
<tr>
<td style="background-color: #5a5c5e; text-align: center">
<h2 style ="color:#FFFFFF"