$feed_uri :
$data :
$channel_data :
$feed_unavailable :
$cache_life :
$cache_dir :
$write_cache_flag :
$callback :
__construct( $callback = FALSE)
parse()
set_cache_life( $period = NULL)
set_feed_url( $url = NULL)
getFeed( $num)
runFeedBackend( $num)
getChannelData()
errorInResponse()
clear()