Errorf returns a new errors whose message is formatted by `fmt.Sprintf`.

Info returns the earliest information attached to any of the errors in the chain of Causes.

Key returns the deepest key attached to the error if any.

New returns a new error annotated with a timestamp, a message and a stack trace.

StackTrace returns the deepest StackTrace attached to any of the errors in the chain of Causes.

Timestamp returns the error timestamp created with the function `WithTimestamp()` and the `ok` return value set to true.

WithInfo annotates the given error `err` with extra information giving more extra context to the error.

WithKey associates the given key with the error.

WithTimestamp annotates the given error `err` with a timestamp.

Wrap annotates the given error `err` with a timestamp, a message and a stack trace.

Wrapf annotates the given error `err` with a timestamp, a message and a stack trace.

Frame represents a program counter inside a stack frame.