drupflare/worker - v1.0.4
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    Variable NATIVE_PLATFORMConst

    NATIVE_PLATFORM: PlatformVersions = ...

    Extensions the interpreter loads, measured rather than inferred.

    tests/integration/loaded-extensions.spec.ts asserts this map both ways against get_loaded_extensions() on the shipping binary; no name in POLYFILLED_PLATFORM is loaded. Function names in the binary are not evidence (opcache's func_info table names functions of extensions the build lacks).