IsNotExist returns true if the error was caused by a non-existing file in the backend. The argument may be a wrapped error. The implementation is responsible for unwrapping it.
(err error)
| 63 | // The argument may be a wrapped error. The implementation is responsible |
| 64 | // for unwrapping it. |
| 65 | IsNotExist(err error) bool |
| 66 | |
| 67 | // IsPermanentError returns true if the error can very likely not be resolved |
| 68 | // by retrying the operation. Backends should return true if the file is missing, |
no outgoing calls