[Insight-users] update image filter

[Kiên Kiêu]

Hi,

I have a question regarding image filter updating. I have a pipeline of 
image filters. At some point, I update one of them using 
UpdateLargestPossibleRegion method. I need to know whether the filter 
has been executed or not (it may have not been executed it no anterior 
filter in the pipeline has been modified since the previous update). 
What method should I use?

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