U:RDoc::AnyMethod[iI"add_observer:ETI""Concurrent::IVar#add_observer;TF:publico:RDoc::Markup::Document:@parts[o:RDoc::Markup::Paragraph;	[I"MAdd an observer on this object that will receive notification on update.;To:RDoc::Markup::BlankLineo;
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I"PUpon completion the `IVar` will notify all observers in a thread-safe way. ;TI"PThe `func` method of the observer will be called with three arguments: the ;TI"L`Time` at which the `Future` completed the asynchronous operation, the ;TI"Pfinal `value` (or `nil` on rejection), and the final `reason` (or `nil` on ;TI"fulfillment).;T@o;
;	[I"J@param [Object] observer the object that will be notified of changes ;TI"D@param [Symbol] func symbol naming the method to call when this;To:RDoc::Markup::Verbatim;	[I"`Observable` has changes`;T:@format0:
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