SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "foo"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        EXPR_STMT
          OFFSET_OF_EXPR
            BUILTIN_KW "builtin"
            POUND "#"
            OFFSET_OF_KW "offset_of"
            L_PAREN "("
            PATH_TYPE
              PATH
                PATH_SEGMENT
                  NAME_REF
                    IDENT "Foo"
            COMMA ","
            WHITESPACE " "
            L_PAREN "("
            NAME_REF
              IDENT "bar"
            DOT "."
            NAME_REF
              IDENT "baz"
            DOT "."
            NAME_REF
              INT_NUMBER "0"
            R_PAREN ")"
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"
