srcpad _loop function

[Sergey Mironov]

Hi. Core design docs [1] tell about _loop function that can be
associated with the source pad. But GstPad reference [2] knows nothing
about. Was it removed from current gstreamer version?
Thanks.
Sergey

[1] http://cgit.freedesktop.org/gstreamer/gstreamer/tree/docs/design/part-scheduling.txt
[2] http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#gst-pad-push-event