Mark transaction classes internal, refs #8827

src/Composer/DependencyResolver/LocalRepoTransaction.php

@@ -23,6 +23,7 @@ use Composer\Semver\Constraint\Constraint;
 
 /**
  * @author Nils Adermann <naderman@naderman.de>
+ * @internal
  */
 class LocalRepoTransaction extends Transaction
 {

src/Composer/DependencyResolver/LockTransaction.php

@@ -22,6 +22,7 @@ use Composer\Test\Repository\ArrayRepositoryTest;
 
 /**
  * @author Nils Adermann <naderman@naderman.de>
+ * @internal
  */
 class LockTransaction extends Transaction
 {

src/Composer/DependencyResolver/Transaction.php

@@ -19,6 +19,7 @@ use Composer\Repository\PlatformRepository;
 
 /**
  * @author Nils Adermann <naderman@naderman.de>
+ * @internal
  */
 class Transaction
 {