strict digraph dfun {

mclimit=2.0

edge [color=gray40]

oneclass [label="one-class"]
twoclass [label="two-class"]
oneindex [label="one-index"]
nn [label="n-n"]
default [label="default-method-only"]
nomethods [label="no-methods"]
constant [label="constant-value"]

subgraph class {

edge [color=black]

oneclass -> twoclass -> oneindex -> nn
oneclass -> nn
twoclass -> nn

}

// oneclass -> caching
// oneclass -> checking
// oneclass -> dispatch
// twoclass -> caching
// twoclass -> checking
// twoclass -> dispatch
// oneindex -> caching
// oneindex -> checking
// oneindex -> dispatch
// nn -> caching
// nn -> checking
// nn -> dispatch

subgraph class -> caching
subgraph class -> checking
subgraph class -> dispatch

initial -> oneclass

initial -> default
initial -> nomethods
initial -> constant

initial -> caching
initial -> checking -> caching
initial -> dispatch
checking -> dispatch

}