|  | @@ -35,4 +35,14 @@
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				|  |  |  
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				|  |  |  @implementation GRXWriter
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				|  |  |  
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				|  |  | +- (void)startWithWriteable:(id<GRXWriteable>)writeable {
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				|  |  | +  NSAssert(NO, @"Missing base implementation for %@", NSStringFromSelector(_cmd));
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				|  |  | +  [self doesNotRecognizeSelector:_cmd];
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				|  |  | +}
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				|  |  | +
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				|  |  | +- (void)finishWithError:(NSError *)errorOrNil {
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				|  |  | +  NSAssert(NO, @"Missing base implementation for %@", NSStringFromSelector(_cmd));
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				|  |  | +  [self doesNotRecognizeSelector:_cmd];
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				|  |  | +}
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				|  |  | +
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				|  |  |  @end
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