AllErrors returns a boolean which is true if the predicate for all errors in the given error return true.

APIStatuses returns the list of API status contained in a given error, and a boolean which is true if the error consists only of API statuses.

Append some errors to an existing error, creating a composite if necessary.

ResolveErrorStatuses tries to resolve all statuses in the given error with an action function.

A CompositeError is an error formed from multiple other errors.