base

var (
	// ErrChannelIO indicates a channel I/O error
	ErrChannelIO = errors.New("channel IO error")
	// ErrInvalidArg indicates an invalid argument has been encountered, most
	// likely an unexpected nil pointer.
	ErrInvalidArg = errors.New("invalid argument")
	// ErrUnexpectedResult indicates an unexpected result from a operation.
	ErrUnexpectedResult = errors.New("return value of operation invalid")
	// ErrResourceUnavailable indicates an unsuccessful attempt to access an
	// unavailable resource.
	ErrResourceUnavailable = errors.New("resource unavailable")
	// ErrItemNotFound indicates that the retrieval of a queryable resource from
	// a collection produced an empty set.
	ErrItemNotFound = errors.New("item not found")
	// ErrNotImplemented indicates that functionality is not available.
	ErrNotImplemented = errors.New("not implemented (yet)")
	// ErrTimeoutExceeded indicates, that a timeout has been exceeded
	ErrTimeoutExceeded = errors.New("timeout exceeded")
	// ErrIntentional indicates, that an error has been intentionally
	// generated; mostly used in tests.
	ErrIntentional = errors.New("intentional")
	// ErrNetClosing is returned when a network descriptor is used after
	// it has been closed. Keep this string consistent because of issue
	// #4373: since historically programs have not been able to detect
	// this error, they look for the string.
	ErrNetClosing = errors.New("use of closed network connection")
)