Composer Namespaces Autoload CaBundle Command Config Console DependencyResolver Downloader EventDispatcher Exception Installer IO Json Package Plugin Question Repository Script SelfUpdate Util Installers Semver Spdx XdebugHandler Interfaces, Classes and Traits Cache Reads/writes to a filesystem cache Compiler The Compiler class compiles composer into a phar Composer Config Factory Creates a configured instance of composer. Installer XdebugHandler