This node allows to render only one node in a list of nodes.
This is useful to hide elements.
SFInt32 whichChoice 0 :
The index of the node in choice to be drawn.
Value can be set to -1 so no node will be drawn.
By default, the first node is rendered.
MFNode choice NULL :
The list of nodes. Only one of the nodes can be rendered at a time.
This example shows how display a node by modifying whichChoice field.