unwrapErr method
E
unwrapErr()
Returns the contained Err value, consuming the this
value.
Exceptions if the value is an Ok, with a custom error message provided by the Ok's value.
Implementation
E unwrapErr() => isOk
? throw UnwrapError(
'called `Result#unwrapErr` on an `Ok` value',
obj: _okValue,
)
: _errValue;