private val ignorePackages: PackagePatterns,
    shadowPackage: String
) {

    private
    val classes: MutableMap<String, ClassDetails> = linkedMapOf()

    val entryPoints: MutableSet<ClassDetails> = linkedSetOf()

    val shadowPackagePrefix =
        shadowPackage.takeIf(String::isNotEmpty)
            ?.let { it.replace('.', '/') + "/" }
            ?: ""

    operator fun get(className: String) =

                if (manifestFile.exists()) {
                    jarOutputStream.addJarEntry(JarFile.MANIFEST_NAME, manifestFile)
                }
                val visited = linkedSetOf<ClassDetails>()
                for (classDetails in classGraph.entryPoints) {
                    visitTree(classDetails, classesDir, jarOutputStream, visited)
                }
            }