Allowed attributes:
EdgeColor, EdgeStyle, Hidden, Name, NodeColor, NodeLabels, NodeStyle, VertexColor, VertexLabels, VertexStyle

## Visualization

VISUAL_TIGHT_SPAN
This is a variation of VISUAL_BOUNDED_GRAPH for the special case of a tight span
Returns: Visual::Graph
VISUAL_BOUNDED_GRAPH (%Visual::Graph::decorations)
Visualize the BOUNDED_GRAPH of a polyhedron.
Possible supplements: VERTEX_COLORS, DIRECTED_GRAPH, MIN_MAX_FACE
VISUAL_SPLITS
Visualize ... don't know what
Returns: Visual::FiniteMetricSpace