errs = appendErrors(errs, errors.New("HTTP route cannot contain both mirror and mirrors"))
	}

	return errs
}

// isInternalHeader returns true if a header refers to an internal value that cannot be modified by Envoy
func isInternalHeader(headerKey string) bool {
	return strings.HasPrefix(headerKey, ":") || strings.EqualFold(headerKey, "host")
}

	RequestHeadersToRemove  []string
	ResponseHeadersToRemove []string
	Authority               string
}

// isInternalHeader returns true if a header refers to an internal value that cannot be modified by Envoy
func isInternalHeader(headerKey string) bool {
	return strings.HasPrefix(headerKey, ":") || strings.EqualFold(headerKey, "host")
}

func ValidateHTTPHeaderWithAuthorityOperationName(name string) error {
	if name == "" {
		return fmt.Errorf("header name cannot be empty")
	}
	// Authority header is validated later
	if isInternalHeader(name) && !isAuthorityHeader(name) {
		return fmt.Errorf(`invalid header %q: header cannot have ":" prefix`, name)
	}
	return nil
}