#vulnerable code 
                                @Override
    public SymbolReference<MethodDeclaration> solveMethod(String name, List<TypeUsage> parameterTypes, TypeSolver typeSolver) {
        List<MethodDeclaration> methods = new ArrayList<>();
        for (Method method : Arrays.stream(clazz.getDeclaredMethods()).filter((m) -> m.getName().equals(name)).sorted(new MethodComparator()).collect(Collectors.toList())) {
            if (method.isBridge() || method.isSynthetic()) continue;
            MethodDeclaration methodDeclaration = new ReflectionMethodDeclaration(method, typeSolver);
            methods.add(methodDeclaration);
        }
        if (getSuperClass(typeSolver) != null) {
            ClassDeclaration superClass = (ClassDeclaration)getSuperClass(typeSolver).getTypeDeclaration();
            SymbolReference<MethodDeclaration> ref = superClass.solveMethod(name, parameterTypes, typeSolver);
            if (ref.isSolved()) {
                methods.add(ref.getCorrespondingDeclaration());
            }
        }
        for (InterfaceDeclaration interfaceDeclaration : getInterfaces(typeSolver)) {
            SymbolReference<MethodDeclaration> ref = interfaceDeclaration.solveMethod(name, parameterTypes, typeSolver);
            if (ref.isSolved()) {
                methods.add(ref.getCorrespondingDeclaration());
            }
        }
        return MethodResolutionLogic.findMostApplicable(methods, name, parameterTypes, typeSolver);
    } 
                            #location 10 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Override
    public SymbolReference<MethodDeclaration> solveMethod(String name, List<TypeUsage> parameterTypes, TypeSolver typeSolver) {
        List<MethodDeclaration> methods = new ArrayList<>();
        for (Method method : Arrays.stream(clazz.getDeclaredMethods()).filter((m) -> m.getName().equals(name)).sorted(new MethodComparator()).collect(Collectors.toList())) {
            if (method.isBridge() || method.isSynthetic()) continue;
            MethodDeclaration methodDeclaration = new ReflectionMethodDeclaration(method, typeSolver);
            methods.add(methodDeclaration);
        }
        if (getSuperClass() != null) {
            ClassDeclaration superClass = (ClassDeclaration)getSuperClass().getTypeDeclaration();
            SymbolReference<MethodDeclaration> ref = superClass.solveMethod(name, parameterTypes, typeSolver);
            if (ref.isSolved()) {
                methods.add(ref.getCorrespondingDeclaration());
            }
        }
        for (InterfaceDeclaration interfaceDeclaration : getInterfaces()) {
            SymbolReference<MethodDeclaration> ref = interfaceDeclaration.solveMethod(name, parameterTypes, typeSolver);
            if (ref.isSolved()) {
                methods.add(ref.getCorrespondingDeclaration());
            }
        }
        return MethodResolutionLogic.findMostApplicable(methods, name, parameterTypes, typeSolver);
    }