420      * @param  string    $class The name of the class
423     public function loadClass($class)  argument
425         if ($file = $this->findFile($class)) {
438      * @param string $class The name of the class
442     public function findFile($class)  argument
445         if (isset($this->classMap[$class])) {
446             return $this->classMap[$class];
448         if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
452             $file = apcu_fetch($this->apcuPrefix.$class, $hit);
458         $file = $this->findFileWithExtension($class, '.php');
462             $file = $this->findFileWithExtension($class, '.hh');
466             apcu_add($this->apcuPrefix.$class, $file);
471             $this->missingClasses[$class] = true;
488      * @param  string       $class
492     private function findFileWithExtension($class, $ext)  argument
495         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
497         $first = $class[0];
499             $subPath = $class;
522         if (false !== $pos = strrpos($class, '\\')) {
528             $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
533                 if (0 === strpos($class, $prefix)) {