/**
  * Find all class and function reflections in the specified file
  *
  * @param string $filename
  * @return Reflection[]
  */
 private function computeReflections($filename)
 {
     $sourceLocator = new SingleFileSourceLocator($filename);
     $reflector = new ClassReflector($sourceLocator);
     return array_merge($sourceLocator->locateIdentifiersByType($reflector, new IdentifierType(IdentifierType::IDENTIFIER_CLASS)), $sourceLocator->locateIdentifiersByType($reflector, new IdentifierType(IdentifierType::IDENTIFIER_FUNCTION)));
 }