class SassC::ImportHandler::ImportCache

def resolve_file_url(path, parent_dir, from_import)
  [parent_dir].concat(@load_paths).each do |load_path|
    resolved = FileSystemImporter.resolve_path(File.absolute_path(path, load_path), from_import)
    return URL.path_to_file_url(resolved) unless resolved.nil?
  end
  nil
end