Folds a named StringFns call to its result, resolving each argument with resolveArg. undefined
when the name is not one of them, an argument does not resolve, or the call does not match what the entry
declares. Shared by the value solver (resolveAsStringFn) and construction-time name resolution.
Folds a named StringFns call to its result, resolving each argument with
resolveArg.undefinedwhen the name is not one of them, an argument does not resolve, or the call does not match what the entry declares. Shared by the value solver (resolveAsStringFn) and construction-time name resolution.