Performs the coalesce.
array An array of file resources
private function getFileResources() {
$paths = array();
foreach ($this->directories as $directory) {
foreach ($directory as $file) {
$relative = $this
->getRelativeName($file, $directory);
if (!isset($paths[$relative])) {
$paths[$relative] = $file;
}
}
}
return array_values($paths);
}