WritableRepositoryInterface

class \Composer\Repository\FilesystemRepository extends \Composer\Repository\WritableArrayRepository
class \Composer\Repository\InstalledArrayRepository extends \Composer\Repository\WritableArrayRepository implements \Composer\Repository\InstalledRepositoryInterface
class \Composer\Repository\InstalledFilesystemRepository extends \Composer\Repository\FilesystemRepository implements \Composer\Repository\InstalledRepositoryInterface
class \Composer\Repository\WritableArrayRepository extends \Composer\Repository\ArrayRepository implements \Composer\Repository\WritableRepositoryInterface uses \Composer\Repository\CanonicalPackagesTrait