Looks for an element inside the bin that implements the given
interface. If such an element is found, it returns the element.
You can cast this element to the given interface afterwards. If you want
all elements that implement the interface, use
gst.bin.Bin.iterateAllByInterface. This function recurses into child bins.
Looks for an element inside the bin that implements the given interface. If such an element is found, it returns the element. You can cast this element to the given interface afterwards. If you want all elements that implement the interface, use gst.bin.Bin.iterateAllByInterface. This function recurses into child bins.