# File lib/rgl/adjacency.rb, line 174
174:     def to_adjacency
175:       result = (directed? ? DirectedAdjacencyGraph : AdjacencyGraph).new
176:       each_vertex { |v| result.add_vertex(v) }
177:       each_edge { |u,v| result.add_edge(u, v) }
178:       result
179:     end