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obtain->initialise
obtain ->initialise: receiver=object|function, selector=name|function, argument=any|function ...
Create a get-template from its receiver, selector and argument list. Note that all arguments may be function objects. When the obtainer is evaluated it first evaluates all functions. Example: 
?- new(B, box(100,100)),
   send(@pce, writeln, B?center?x).
50

See also class message.

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