SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "foo"
    GENERIC_PARAM_LIST
      L_ANGLE "<"
      TYPE_PARAM
        NAME
          IDENT "T"
        COLON ":"
        WHITESPACE " "
        TYPE_BOUND_LIST
          TYPE_BOUND
            FOR_BINDER
              FOR_KW "for"
              GENERIC_PARAM_LIST
                L_ANGLE "<"
                LIFETIME_PARAM
                  LIFETIME
                    LIFETIME_IDENT "'a"
                R_ANGLE ">"
            WHITESPACE " "
            L_BRACK "["
            CONST_KW "const"
            R_BRACK "]"
            WHITESPACE " "
            ASYNC_KW "async"
            WHITESPACE " "
            PATH_TYPE
              PATH
                PATH_SEGMENT
                  NAME_REF
                    IDENT "Trait"
      R_ANGLE ">"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        R_CURLY "}"
  WHITESPACE "\n"
