PK_ERROR_code_t               PK_FACE_close_gaps
(
--- received arguments ---
PK_FACE_t                     face,        --- face
const PK_FACE_close_gaps_o_t *options,     --- options on how to close loops

--- returned arguments ---
int                    *const n_vertices,  --- number of vertices where gaps
                                           --- remain
PK_VERTEX_t           **const vertices     --- vertices where gaps remain
)


This function closes gaps at tolerant vertices in the face loops by modifying
the fin geometries of the loops. Where gaps cannot be closed the vertices at
those gaps will be returned.