public ProxyBuilder<T> withSharedClassLoader() {
    this.sharedClassLoader = true;
    return this;
  }
Sets the directory where executable code is stored. See {@link DexMaker#generateAndLoad
DexMaker.generateAndLoad()} for guidance on choosing a secure location for the dex cache.
android/android_framework/dex-maker/src/main/java/com/android/dx/stock/ProxyBuilder.java