Structural guard — discriminates a Problem Details body (parallel to saastarter's isApiError and core's isReference). Checks the two always-present RFC-9457 members title (string) + status (number).
isApiError
isReference
title
status
Structural guard — discriminates a Problem Details body (parallel to saastarter's
isApiErrorand core'sisReference). Checks the two always-present RFC-9457 memberstitle(string) +status(number).