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

        try {
            // back-end/koopa/trees/antlr/filter/generator/ANTLRv3TreeFilter.g:135:2: ( ^( 'throws' ( ID )+ ) )
            // back-end/koopa/trees/antlr/filter/generator/ANTLRv3TreeFilter.g:135:4: ^( 'throws' ( ID )+ )
            {
            match(input,80,FOLLOW_80_in_throwsSpec627); 

            match(input, Token.DOWN, null); 
            // back-end/koopa/trees/antlr/filter/generator/ANTLRv3TreeFilter.g:135:15: ( ID )+
            int cnt19=0;
            loop19:
            do {
                int alt19=2;
                int LA19_0 = input.LA(1);

                if ( (LA19_0==ID) ) {
                    alt19=1;
                }


                switch (alt19) {
            	case 1 :
            	    // back-end/koopa/trees/antlr/filter/generator/ANTLRv3TreeFilter.g:135:15: ID
            	    {
            	    match(input,ID,FOLLOW_ID_in_throwsSpec629); 

            	    }
            	    break;

            	default :
            	    if ( cnt19 >= 1 ) break loop19;
                        EarlyExitException eee =
                            new EarlyExitException(19, input);
                        throw eee;
                }
                cnt19++;
            } while (true);


            match(input, Token.UP, null); 

            }

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