[vtkusers] cell belongs to polydata

[Jacinto Perez]

Hello, 

 I have 2 polydatas . One is a subset of the other one.
 I am traversing the biggest one and I want to check if the current cell of the traversal belongs to the smaller one to.

 Is there a methond provided by vtk to do this?
 Or how can I make it?

 Thank you!
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