Validated type guards for SetSessionConfigOptionRequest's known variants.
Each guard validates the variant's payload, not just its discriminant
tag: a malformed known variant (right tag, wrong payload) matches no
guard — mirroring wire validation, which rejects such values instead
of classifying them as custom.
Guards check the value as given: fields that wire deserialization
salvages to a default (e.g. a malformed _meta) are only normalized
by parsing, and for ambiguous raw shapes (a known tag combined with
another variant's payload) guards are conservative where wire parsing
may still accept the value — narrow wire-parsed values when exact
parity matters.
Narrow to a custom or future variant: the type tag matches no known variant, with a valid payload.
TypeScript keeps the known variants in the narrowed union (they are
structural subtypes of the catch-all), so read vendor payload keys
via a widening cast: (value as Record<string, unknown>).someKey.
Validated type guards for
SetSessionConfigOptionRequest's known variants.Each guard validates the variant's payload, not just its discriminant tag: a malformed known variant (right tag, wrong payload) matches no guard — mirroring wire validation, which rejects such values instead of classifying them as custom.
Guards check the value as given: fields that wire deserialization salvages to a default (e.g. a malformed
_meta) are only normalized by parsing, and for ambiguous raw shapes (a known tag combined with another variant's payload) guards are conservative where wire parsing may still accept the value — narrow wire-parsed values when exact parity matters.