174      * @param string              $prefix  The prefix
180     public function add($prefix, $paths, $prepend = false)  argument
183         if (!$prefix) {
199         $first = $prefix[0];
200         if (!isset($this->prefixesPsr0[$first][$prefix])) {
201             $this->prefixesPsr0[$first][$prefix] = $paths;
206             $this->prefixesPsr0[$first][$prefix] = array_merge(
208                 $this->prefixesPsr0[$first][$prefix]
211             $this->prefixesPsr0[$first][$prefix] = array_merge(
212                 $this->prefixesPsr0[$first][$prefix],
222      * @param string              $prefix  The prefix/namespace, with trailing '\\'
230     public function addPsr4($prefix, $paths, $prepend = false)  argument
233         if (!$prefix) {
246         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
248             $length = strlen($prefix);
249             if ('\\' !== $prefix[$length - 1]) {
252             $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
253             $this->prefixDirsPsr4[$prefix] = $paths;
256             $this->prefixDirsPsr4[$prefix] = array_merge(
258                 $this->prefixDirsPsr4[$prefix]
262             $this->prefixDirsPsr4[$prefix] = array_merge(
263                 $this->prefixDirsPsr4[$prefix],
273      * @param string              $prefix The prefix
278     public function set($prefix, $paths)  argument
280         if (!$prefix) {
283             $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths;
291      * @param string              $prefix The prefix/namespace, with trailing '\\'
298     public function setPsr4($prefix, $paths)  argument
300         if (!$prefix) {
303             $length = strlen($prefix);
304             if ('\\' !== $prefix[$length - 1]) {
307             $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
308             $this->prefixDirsPsr4[$prefix] = (array) $paths;
532             foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
533                 if (0 === strpos($class, $prefix)) {