SOURCE_FILE@0..46
  FN@0..45
    FN_KW@0..2 "fn"
    WHITESPACE@2..3 " "
    NAME@3..6
      IDENT@3..6 "foo"
    PARAM_LIST@6..8
      L_PAREN@6..7 "("
      R_PAREN@7..8 ")"
    WHITESPACE@8..9 " "
    BLOCK_EXPR@9..45
      L_CURLY@9..10 "{"
      WHITESPACE@10..15 "\n    "
      LET_STMT@15..31
        LET_KW@15..18 "let"
        WHITESPACE@18..19 " "
        WILDCARD_PAT@19..20
          UNDERSCORE@19..20 "_"
        WHITESPACE@20..21 " "
        EQ@21..22 "="
        WHITESPACE@22..23 " "
        BIN_EXPR@23..30
          BLOCK_EXPR@23..26
            L_CURLY@23..24 "{"
            LITERAL@24..25
              INT_NUMBER@24..25 "1"
            R_CURLY@25..26 "}"
          WHITESPACE@26..27 " "
          AMP@27..28 "&"
          WHITESPACE@28..29 " "
          LITERAL@29..30
            INT_NUMBER@29..30 "2"
        SEMICOLON@30..31 ";"
      WHITESPACE@31..36 "\n    "
      EXPR_STMT@36..39
        BLOCK_EXPR@36..39
          L_CURLY@36..37 "{"
          LITERAL@37..38
            INT_NUMBER@37..38 "1"
          R_CURLY@38..39 "}"
      WHITESPACE@39..40 " "
      EXPR_STMT@40..43
        REF_EXPR@40..42
          AMP@40..41 "&"
          LITERAL@41..42
            INT_NUMBER@41..42 "2"
        SEMICOLON@42..43 ";"
      WHITESPACE@43..44 "\n"
      R_CURLY@44..45 "}"
  WHITESPACE@45..46 "\n"