`h.getSetCookie?.()` on a native Headers handle failed with SC2020: the
optional-chain lowering first reads the callee as a value, and native
handle methods have no first-class value. A required standard-library
method on a never-nullish receiver always exists, so `?.()` is the plain
call.
When that method read has no lowering, the optional chain now re-dispatches
the plain call. Reads that lower keep the existing path unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
