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());
    }

        AnnotationProcessingData annotationProcessingData = getAnnotationProcessingData(spec, result);
        CompilerApiData compilerApiData = getCompilerApiData(spec, result);
        ClassSetAnalysisData minimizedClasspathSnapshot = classpathSnapshot.reduceToTypesAffecting(outputSnapshot, compilerApiData);

        return annotationProcessingData;
    }

    public ClassSetAnalysisData getClasspathSnapshot() {
        return classpathSnapshot;
    }

    public CompilerApiData getCompilerApiData() {
        return compilerApiData;
    }

    public static class Serializer extends AbstractSerializer<PreviousCompilationData> {

        private final StringInterner interner;