Making dependency to `Ocramius\CallbackLazyMap` useless
Removing dead code (related to `ocramius/lazy-map`)
Removing `ocramius/lazy-map` dependency
Fixing referenced classes in performance tests
Removing last references to old `Instantiator` base namespace
Removing unused `ob_start()` and similar risky operations
Fixing error message to be checked for PHP 5.4.x
Optimized imports
Optimized imports