shape(+Resource, -Attributes, +Options) is det[private]

Shape is the shape of the node to use for Resource. Shapes can be modified in two ways:

• through the option shape_hook(Closure), which must return a valid Attributes list for GraphViz
• By addings sub-properties of graphviz:styleParameter to the class of the resource. The value of this property defines the attribute value, while the label defines the attribute-name.