star method
Creates a Graph that forms a star.
Implementation
Graph<V, E> star({required int vertexCount}) {
final builder = newBuilder();
if (vertexCount <= 0) {
return builder.build();
}
builder.addVertexIndex(0);
for (var i = 1; i < vertexCount; i++) {
builder.addEdgeIndex(0, i);
}
return builder.build();
}