syntax_data: {"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     //   both for exports and imports through foreign items. This is handled above.
context_before:     // * `#[rustc_std_internal_symbol]` mangles the symbol name in a special way
context_after:     // [1]: https://bugs.llvm.org/show_bug.cgi?id=44316