/*! 

\page faces_page Check Free Faces

Highlights all free faces of a given shape. A free
face is a face which is not shared between two objects of the shape.

\note This functionality works only in VTK viewer.

\b Result: a list of IDs of all free faces, containing in the shape.

<b>TUI Command:</b> <em>GetFreeFacesIDs(Shape),</em> where \em Shape is
a shape to be checked.

\image html repair10.png

*/