function _getContentHeight() {
		if (Device.system.desktop) {
			return "700px";
		}
		if (Device.system.tablet) {
			return Device.orientation.landscape ? "600px" : "600px";
		}
	}
Configuration for groups (collective search).

The object needs to contain an entry for every possible group. The labels of every group need to have a structure of {@link sap.ui.mdc.valuehelp.content.GroupLabel}.
If no configuration is provided a standard text "search and select" is used.

<b>Sample:</b>
<pre>
{
group1: {label: "Label 1 ({0})", nnLabel: "Label 1"},
group2: {label: "Label 2 ({0})", nnLabel: "Label 2"}
}
</pre>