get the number of road segments in the graph concode_field_sep HashSet<MapEdge> edges concode_elem_sep HashMap<GeographicPoint,MapNode> pointNodeMap concode_field_sep List<GeographicPoint> dijkstra concode_elem_sep List<GeographicPoint> dijkstra concode_elem_sep boolean isNode concode_elem_sep List<GeographicPoint> aStarSearch concode_elem_sep List<GeographicPoint> aStarSearch concode_elem_sep void main concode_elem_sep int getNumVertices concode_elem_sep List<GeographicPoint> reconstructPath concode_elem_sep Set<MapNode> getNeighbors concode_elem_sep List<GeographicPoint> bfs concode_elem_sep List<GeographicPoint> bfs concode_elem_sep void printNodes concode_elem_sep void printEdges concode_elem_sep Set<GeographicPoint> getVertices concode_elem_sep void addVertex concode_elem_sep void addVertex concode_elem_sep void addEdge concode_elem_sep void addEdge concode_elem_sep void addEdge concode_elem_sep void addEdge
int function ( ) { return edges . size ( ) ; }