How to avoid LazyInitializationException when using ManyToMany as value for primefaces selectCheckboxMenu

The idea is to let the component know the type of data source collection.

Sample code:

<p:selectCheckboxMenu value="#{obj.students}" filter="true" filterMatchMode="startsWith">
	<f:attribute name="collectionType" value="java.util.ArrayList" />
	<f:selectItems value="#{elements}" var="elem" itemLabel="#{elem[valueLabelField]}" itemValue="#{elem}" />
</p:selectCheckboxMenu>

Where elements is a list of students.