Region stdErr = new Region(input.readLong(), input.readLong());
                            classBuilder.add(testId, new Index(stdOut, stdErr));
                        }

                        rootBuilder.add(classId, classBuilder.build());
                    }
                } finally {
                    input.close();
                }

            for (String canonicalClassName : ((CanGenerateClasses) result).getClassNames()) {
                ClassName className = ClassName.bestGuess(canonicalClassName);
                TypeSpec.Builder builder = TypeSpec.classBuilder(className);
                CanGenerateClasses generateType = (CanGenerateClasses) result;
                getOriginatingElements(generateType.getCoveredRequests()).forEach(builder::addOriginatingElement);

    private static TypeSpec.Builder generateInterceptorClass(String className, BytecodeInterceptorType interceptorType, CodeBlock scopes, List<CallInterceptionRequest> requests) {
        TypeSpec.Builder generatedClass = TypeSpec.classBuilder(className)
            .addAnnotation(GENERATED_ANNOTATION.asClassName())
            .superclass(CALL_INTERCEPTOR_CLASS)
            .addSuperinterface(SIGNATURE_AWARE_CALL_INTERCEPTOR_CLASS)

            .addStatement("return new $L($N, $N, $N)", className, "methodVisitor", "metadata", "context")
            .addAnnotation(Override.class)
            .build();
        return TypeSpec.classBuilder("Factory")
            .addModifiers(Modifier.PUBLIC, Modifier.STATIC)
            .addSuperinterface(ClassName.get(JvmBytecodeCallInterceptor.Factory.class))