class TinyMCE::Rails::JsonManifest

def append(logical_path, file)
  stat = File.stat(file)
  assets[logical_path] = logical_path
  files[logical_path] = {
    "logical_path" => logical_path,
    "mtime"        => stat.mtime.iso8601,
    "size"         => stat.size,
    "digest"       => nil
  }
end