protected override Entity InternalResolve <TNode>(
            GraphStructuredProgram <TNode> program,
            ResolvedMethod <TNode> sourceMethod,
            Reference reference)
        {
            var classMethodReference = (ClassMethodReference)reference;

            var resolvedOwner = Resolve(program, sourceMethod, classMethodReference.Owner);

            if (resolvedOwner is ResolvedClassId owningClassId)
            {
                var owner = program.FindClassById(owningClassId);

                var method   = program.GetOrCreateMethod(owner, classMethodReference.Name);
                var methodId = program.GetOrCreateMethodId(classMethodReference.Name);

                var resolvedReference = new ResolvedClassMethodReference <TNode>(owningClassId, methodId);
                resolvedReference.Method = method;

                return(resolvedReference);
            }

            if (resolvedOwner is SecondaryEntity owningEntity)
            {
                var methodId = program.GetOrCreateMethodId(classMethodReference.Name);

                var resolvedReference = new ResolvedObjectMethodReference <TNode>(owningEntity, methodId);
                resolvedReference.FindClassMethod = program.FindMethodById;

                sourceMethod.StoreAdditionalVariable(resolvedReference);
                return(resolvedReference);
            }

            return(null);
        }
        protected override Entity InternalResolve <TNode>(
            GraphStructuredProgram <TNode> program,
            ResolvedMethod <TNode> sourceMethod,
            Reference reference)
        {
            var localFunctionReference = (LocalFunctionReference)reference;

            var methodId = program.GetOrCreateMethodId(localFunctionReference.MethodId.Value);
            var method   = sourceMethod.Methods[methodId];

            var resolvedReference = new ResolvedLocalFunctionReference <TNode>(methodId)
            {
                Method = method
            };

            return(resolvedReference);
        }
        protected override bool Step(
            GraphStructuredProgram <TNode> targetProgram,
            ResolvedMethod <TNode> owningMethod,
            TNode source,
            Statement statement,
            TNode target,
            Func <TNode> nodeCreator)
        {
            SecondaryEntity CreateNewVariable()
            {
                var nextId   = owningMethod.Variables.Keys.Max() + 1;
                var variable = new ResolvedLocalVariable(nextId);

                owningMethod.AddLocalVariable(variable);
                return(variable);
            }

            if (statement is InvocationStatement invocation)
            {
                var passedParameters =
                    invocation.PassedParameters.GroupBy(
                        pair => ReferenceResolver.Resolve(targetProgram, owningMethod, pair.Value),
                        pair => pair.Key)
                    .ToDictionary(
                        pair =>
                {
                    Trace.Assert(pair.Key != null);
                    return(pair.Key);
                },
                        pair =>
                {
                    var targets = pair.ToList();
                    return(targets.Count == 1 ?
                           targets[0] :
                           new ParameterIndicesSet(
                               targets.Select(targetIndex => targetIndex.Value)));
                });

                var returnedValues =
                    invocation.ReturnedValues.ToDictionary(
                        pair =>
                {
                    Trace.Assert(pair.Key != null);
                    return(pair.Key);
                },
                        pair => (SecondaryEntity)ReferenceResolver.Resolve(targetProgram, owningMethod, pair.Value));

                var normalizedPassedParameters = AddIntermediateEdgesIfNeeded(
                    targetProgram, passedParameters, source, nodeCreator, CreateNewVariable, out var newSource);

                ResolvedInvocationStatement <TNode> resolvedInvocationStatement = null;
                if (invocation.InvocationTarget is ClassMethodTarget classMethodTarget)
                {
                    var targetMethodId = targetProgram.GetOrCreateMethodId(classMethodTarget.TargetMethod);
                    var resolvedOwner  = ReferenceResolver.Resolve(
                        targetProgram, owningMethod, classMethodTarget.TargetClass);

                    resolvedInvocationStatement =
                        new ResolvedInvocationStatement <TNode>(
                            invocation, normalizedPassedParameters, returnedValues, resolvedOwner, targetMethodId);
                }

                if (invocation.InvocationTarget is LocalVariableTarget localVariableTarget)
                {
                    var resolvedOwner = ReferenceResolver.Resolve(
                        targetProgram, owningMethod, new LocalVariableReference(localVariableTarget.Index));

                    resolvedInvocationStatement =
                        new ResolvedInvocationStatement <TNode>(
                            invocation, normalizedPassedParameters, returnedValues, resolvedOwner, targetProgram.GetOrCreateMethodId("Invoke"));
                }

                if (invocation.InvocationTarget is ClassFieldTarget classFieldTarget)
                {
                    var resolvedOwner = ReferenceResolver.Resolve(
                        targetProgram, owningMethod, new ClassFieldReference(classFieldTarget.TargetClass, classFieldTarget.TargetField));

                    resolvedInvocationStatement =
                        new ResolvedInvocationStatement <TNode>(
                            invocation, normalizedPassedParameters, returnedValues, resolvedOwner, targetProgram.GetOrCreateMethodId("Invoke"));
                }

                if (invocation.InvocationTarget is ClassPropertyTarget classPropertyTarget)
                {
                    var resolvedOwner = ReferenceResolver.Resolve(
                        targetProgram, owningMethod, new ClassPropertyReference(classPropertyTarget.TargetClass, classPropertyTarget.TargetProperty));

                    resolvedInvocationStatement =
                        new ResolvedInvocationStatement <TNode>(
                            invocation, normalizedPassedParameters, returnedValues, resolvedOwner, targetProgram.GetOrCreateMethodId("Invoke"));
                }

                if (invocation.InvocationTarget is LocalFunctionTarget localFunctionTarget)
                {
                    var resolvedOwner  = owningMethod;
                    var targetMethodId = targetProgram.GetOrCreateMethodId(localFunctionTarget.TargetFunction.Value);

                    resolvedInvocationStatement =
                        new ResolvedInvocationStatement <TNode>(
                            invocation, normalizedPassedParameters, returnedValues, resolvedOwner, targetMethodId);
                }

                Trace.Assert(resolvedInvocationStatement != null);
                var operation = new Operation <TNode>(resolvedInvocationStatement, target);

                targetProgram.AddOperation(newSource, operation);
                return(false);
            }

            return(true);
        }