public bool link
The link must be from source to destination; the other direction will not be tried. The function looks for existing pads that aren't linked
yet. It will request new pads if necessary. Such pads need to be released manually when unlinking. If multiple links are possible, only one is
Make sure you have added your elements to a bin or pipeline with add before
trying to link them.
||the Element containing the destination pad.
|TRUE if the elements could be linked, FALSE otherwise.