SOURCE_FILE@0..35
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      IDENT@3..7 "main"
    PARAM_LIST@7..9
      L_PAREN@7..8 "("
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      L_CURLY@10..11 "{"
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      FN@16..32
        ABI@16..22
          EXTERN_KW@16..22 "extern"
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        FN_KW@23..25 "fn"
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          IDENT@26..27 "f"
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  WHITESPACE@34..35 "\n"