Kaba class Node ed

...

Syntax ed

class Node
    var ind: InternalNodeData

    # constructors
    func mut __init__()

    # functions
    func mut create_data_sink()
    func mut create_sink(f: void->void) -> Sink&
    func mut unsubscribe(observer: void&)

Functions ed

func mut create_data_sink()
...

func mut create_sink(f: void->void) -> Sink&
...

func mut unsubscribe(observer: void&)
...

Elements ed

var ind: InternalNodeData
...