PK_ERROR_code_t               PK_LOOP_close_gaps
(
--- received arguments ---
PK_LOOP_t                     loop,       --- loop
const PK_LOOP_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 loop by modifying the
edge/fin geometry. Where gaps cannot be closed the vertices at those gaps will
be returned.