Syntax

   @Force2D()
   
Description

   This function forces the feature to be 2D and returns the original 
   dimensionality of the feature. If the input feature was 3D, then the z 
   dimension will be dropped. If the input feature is 2D, then the feature will 
   be untouched. 

      Tip: @Force2D is useful when outputting data to a format like AutoCAD 
      files, since many AutoCAD-compatible products cannot process 3D files.