AIMA.Core.Logic.FOL.KB.FOLKnowledgeBase.fetchMatchingFacts C# (CSharp) Method

        private List<Literal> fetchMatchingFacts(Literal l)
        {
            if (!indexFacts.ContainsKey(getFactKey(l)))
            {
                return null;
            }
            return indexFacts[getFactKey(l)];
        }