validation

type Errors interface {
	// Add adds an error to the set of errors accumulated by Errors. If err is nil, this does nothing.
	Add(err error)

	// Warn adds an error to a separate set of Errors that are only warnings. These warnings should not prevent validation
	// from passing, but should be presented to the user.
	Warn(err error)

	// Result returns an error containing all of the errors accumulated or nil if there were no errors
	Result() error

	// Warnings returns a string representing all of the warning messages accumulated or "" if there were no warnings
	Warnings() string
}