SOURCE_FILE@0..37
  FN@0..36
    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..36
      L_CURLY@9..10 "{"
      WHITESPACE@10..15 "\n    "
      EXPR_STMT@15..21
        YIELD_EXPR@15..20
          YIELD_KW@15..20 "yield"
        SEMICOLON@20..21 ";"
      WHITESPACE@21..26 "\n    "
      EXPR_STMT@26..34
        YIELD_EXPR@26..33
          YIELD_KW@26..31 "yield"
          WHITESPACE@31..32 " "
          LITERAL@32..33
            INT_NUMBER@32..33 "1"
        SEMICOLON@33..34 ";"
      WHITESPACE@34..35 "\n"
      R_CURLY@35..36 "}"
  WHITESPACE@36..37 "\n"