public List<Integer> getLLDecisions() {
		DecisionInfo[] decisions = atnSimulator.getDecisionInfo();
		List<Integer> LL = new ArrayList<Integer>();
		for (int i=0; i<decisions.length; i++) {
			long fallBack = decisions[i].LL_Fallback;
			if ( fallBack>0 ) LL.add(i);
		}
		return LL;
	}
Gets the decision numbers for decisions that required one or more
full-context predictions during parsing. These are decisions for which
{@link DecisionInfo#LL_Fallback} is non-zero.

@return A list of decision numbers which required one or more
full-context predictions during parsing.
runtime/Java/src/org/antlr/v4/runtime/atn/ParseInfo.java