public final ANTLRv3TreeFilter.optionsSpec_return optionsSpec() throws RecognitionException {
        ANTLRv3TreeFilter.optionsSpec_return retval = new ANTLRv3TreeFilter.optionsSpec_return();
        retval.start = input.LT(1);

        try {
            // back-end/koopa/trees/antlr/filter/generator/ANTLRv3TreeFilter.g:93:2: ( ^( OPTIONS ( option )+ ) )
            // back-end/koopa/trees/antlr/filter/generator/ANTLRv3TreeFilter.g:93:4: ^( OPTIONS ( option )+ )
            {
            match(input,OPTIONS,FOLLOW_OPTIONS_in_optionsSpec340); 

            match(input, Token.DOWN, null); 
            // back-end/koopa/trees/antlr/filter/generator/ANTLRv3TreeFilter.g:93:14: ( option )+
            int cnt11=0;
            loop11:
            do {
                int alt11=2;
                int LA11_0 = input.LA(1);

                if ( (LA11_0==71) ) {
                    alt11=1;
                }


                switch (alt11) {
            	case 1 :
            	    // back-end/koopa/trees/antlr/filter/generator/ANTLRv3TreeFilter.g:93:14: option
            	    {
            	    pushFollow(FOLLOW_option_in_optionsSpec342);
            	    option();

            	    state._fsp--;


            	    }
            	    break;

            	default :
            	    if ( cnt11 >= 1 ) break loop11;
                        EarlyExitException eee =
                            new EarlyExitException(11, input);
                        throw eee;
                }
                cnt11++;
            } while (true);


            match(input, Token.UP, null); 

            }

        }
        catch (RecognitionException re) {
            reportError(re);
            recover(input,re);
        }
        finally {
        }
        return retval;
    }