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    "
        METHOD_CALL_EXPR
          PATH_EXPR
            PATH
              PATH_SEGMENT
                NAME_REF
                  IDENT "x"
          DOT "."
          WHITESPACE "\n    "
          ARG_LIST
            L_PAREN "("
            R_PAREN ")"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"
error 17: expected method name, field name or number
