SOURCE_FILE@0..30
  FN@0..29
    FN_KW@0..2 "fn"
    WHITESPACE@2..3 " "
    NAME@3..6
      IDENT@3..6 "foo"
    PARAM_LIST@6..26
      L_PAREN@6..7 "("
      PARAM@7..25
        TUPLE_PAT@7..13
          L_PAREN@7..8 "("
          IDENT_PAT@8..9
            NAME@8..9
              IDENT@8..9 "x"
          COMMA@9..10 ","
          WHITESPACE@10..11 " "
          IDENT_PAT@11..12
            NAME@11..12
              IDENT@11..12 "y"
          R_PAREN@12..13 ")"
        COLON@13..14 ":"
        WHITESPACE@14..15 " "
        TUPLE_TYPE@15..25
          L_PAREN@15..16 "("
          PATH_TYPE@16..19
            PATH@16..19
              PATH_SEGMENT@16..19
                NAME_REF@16..19
                  IDENT@16..19 "i32"
          COMMA@19..20 ","
          WHITESPACE@20..21 " "
          PATH_TYPE@21..24
            PATH@21..24
              PATH_SEGMENT@21..24
                NAME_REF@21..24
                  IDENT@21..24 "i32"
          R_PAREN@24..25 ")"
      R_PAREN@25..26 ")"
    WHITESPACE@26..27 " "
    BLOCK_EXPR@27..29
      L_CURLY@27..28 "{"
      R_CURLY@28..29 "}"
  WHITESPACE@29..30 "\n"