[vtkusers] how to replicate the data rendering line between two vtkresliceimageviewer variables?

[杨柳儿青]

hello guys,
 I want to assign the data from a vtkresliceimageviewer variable to anther ones.If I use "=",it copys the data only.How to replicate the data rendering line between two vtkresliceimageviewer variables? I will be crazy because of that question.
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