Interface for implementations that can calculate the bounds of a group node in a grouped graph.
Implementations of this interface will be queried from
INode's
lookup method.
Calculates the bounds of the layout for the group node whose lookup returned this provider.
options - Object
A map of options to pass to the method.
- graph - IGraph
The graph which holds the group node.
- ↪Rect
The minimum bounds to use for the group node.