|  | @@ -1603,19 +1603,6 @@ fn: function (aNumber) {
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				|  |  |  source: unescape('valueWithInterval%3A%20aNumber%0A%09%5E%7B%27return%20setInterval%28self%2C%20aNumber%29%27%7D')}),
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				|  |  |  smalltalk.BlockClosure);
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				|  |  |  
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				|  |  | -smalltalk.addMethod(
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				|  |  | -'_ensure_',
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				|  |  | -smalltalk.method({
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				|  |  | -selector: 'ensure:',
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				|  |  | -category: 'evaluating',
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				|  |  | -fn: function (aBlock) {
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				|  |  | -    var self = this;
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				|  |  | -    (function () {var success = true;try {self();} catch (e) {success = false;aBlock();throw e;}if (success) {aBlock();}}());
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				|  |  | -    return self;
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				|  |  | -},
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				|  |  | -source: unescape('ensure%3A%20aBlock%0A%09%22Evaluate%20a%20termination%20block%20after%20evaluating%20the%20receiver%2C%20regardless%20of%0A%09%20whether%20the%20receiver%27s%20evaluation%20completes.%22%0A%09%7B%27%0A%09%09var%20success%20%3D%20true%3B%0A%09%09try%7Bself%28%29%7D%20catch%28e%29%20%7B%0A%09%09%09success%20%3D%20false%3B%0A%09%09%09aBlock%28%29%3B%0A%09%09%09throw%28e%29%7D%0A%09%09if%28success%29%7BaBlock%28%29%7D%0A%09%27%7D')}),
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				|  |  | -smalltalk.BlockClosure);
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				|  |  | -
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				|  |  |  
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				|  |  |  
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				|  |  |  smalltalk.addClass('Boolean', smalltalk.Object, [], 'Kernel');
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				|  | @@ -3499,10 +3486,10 @@ selector: 'at:ifAbsent:',
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				|  |  |  category: 'accessing',
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				|  |  |  fn: function (aKey, aBlock) {
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				|  |  |      var self = this;
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				|  |  | -    return self._basicAt_(aKey)._ifNil_(aBlock);
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				|  |  | +    return self._keys()._includes_(aKey)._ifTrue_ifFalse_(function () {return self._basicAt_(aKey);}, aBlock);
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				|  |  |      return self;
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				|  |  |  },
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				|  |  | -source: unescape('at%3A%20aKey%20ifAbsent%3A%20aBlock%0A%09%5E%28self%20basicAt%3A%20aKey%29%20ifNil%3A%20aBlock%0A')}),
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				|  |  | +source: unescape('at%3A%20aKey%20ifAbsent%3A%20aBlock%0A%09%5E%28self%20keys%20includes%3A%20aKey%29%0A%09%09ifTrue%3A%20%5Bself%20basicAt%3A%20aKey%5D%0A%09%09ifFalse%3A%20aBlock')}),
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				|  |  |  smalltalk.Dictionary);
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				|  |  |  
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				|  |  |  smalltalk.addMethod(
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