IsConnectionRefused returns true if the given error is caused by an "connection refused" error.

IsConnectionReset returns true if the given error is caused by an "connection reset by peer" error.

IsContextCanceled returns true if the given error is caused by a context cancelation.

IsContextDeadlineExpired returns true if the given error is caused by a context deadline expiration.

IsEOF returns true if the given error is caused by an EOF error.

IsTemporary returns true if the given error is caused by a temporary error.

IsTimeout returns true if the given error is caused by a timeout error.

AggregateError is a helper to wrap zero or more errors as a go `error`.