One complication is that unlike other `*MapOf` met...

# stdlib

[eshioji]

One complication is that unlike other *MapOf methods, enumMapOf would have to have access to the enum’s class object. So either we can use the signature enumMapOf(pairs) and disallow creating a empty enum map (because we won’t be able to get hold of the class object), or we could require the user to pass the class object as a parameter.