{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"///"}]}
    /// Instead this is left empty. The reason is that `ExternBlockFileAstId` is pretty unstable
    /// Subtle: items in `extern` blocks **do not** store the ID of the extern block here.
    /// (it contains only an index), and extern blocks don't introduce a new scope, so storing