ClassSetAnalysisData classpathSnapshot = classpathSnapshotter.getClasspathSnapshot(Iterables.concat(spec.getCompileClasspath(), spec.getModulePath()));
        AnnotationProcessingData annotationProcessingData = getAnnotationProcessingData(spec, result);
        CompilerApiData compilerApiData = getCompilerApiData(spec, result);
        ClassSetAnalysisData minimizedClasspathSnapshot = classpathSnapshot.reduceToTypesAffecting(outputSnapshot, compilerApiData);

    public PreviousCompilation(PreviousCompilationData data) {
        this.data = data;
        this.classAnalysis = new ClassSetAnalysis(data.getOutputSnapshot(), data.getAnnotationProcessingData(), data.getCompilerApiData());
    }

    @Nullable
    public ClassSetAnalysis getClasspath() {
        return new ClassSetAnalysis(data.getClasspathSnapshot());
    }

        this.compilerApiData = compilerApiData;
    }

    public ClassSetAnalysisData getOutputSnapshot() {
        return outputSnapshot;
    }

    public AnnotationProcessingData getAnnotationProcessingData() {
        return annotationProcessingData;
    }

    public ClassSetAnalysisData getClasspathSnapshot() {
        return classpathSnapshot;
    }

    public CompilerApiData getCompilerApiData() {