notFound constant
HttpStatus
const notFound
404 NOT FOUND.
The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.
A 404 status code does not indicate whether this lack of representation is temporary or permanent; the 410 Gone status code is preferred over 404 if the origin server knows, presumably through some configurable means, that the condition is likely to be permanent.
A 404 response is cacheable by default; i.e., unless otherwise indicated by the method definition or explicit cache controls.
Implementation
static const HttpStatus notFound = HttpStatus._(
code: HttpStatusCode.notFound,
name: 'Not Found',
description: 'The origin server did not find a current representation for '
'the target resource or is not willing to disclose that one exists.',
);