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

        try {
            // back-end/koopa/trees/antlr/filter/generator/ANTLRv3TreeFilter.g:97:5: ( ^( '=' ID optionValue ) )
            // back-end/koopa/trees/antlr/filter/generator/ANTLRv3TreeFilter.g:97:9: ^( '=' ID optionValue )
            {
            match(input,71,FOLLOW_71_in_option361); 

            match(input, Token.DOWN, null); 
            match(input,ID,FOLLOW_ID_in_option363); 
            pushFollow(FOLLOW_optionValue_in_option365);
            optionValue();

            state._fsp--;


            match(input, Token.UP, null); 

            }

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