[vtkusers] SetInputConnection for vtkPNGReader

[Utkarsh Ayachit]

Readers don't take any input. Hence, it's generally not possible to call 
SetInputConnection on a reader.

Utkarsh

John Eke wrote:
> Hi,
> 
> I'm not sure if this is possible, but is there a work around or a way to 
> call SetInputConnection on a vtkPNGReader?
> 
> Thanks
> 
> John
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