void cvGraphRemoveEdgeByPtr(CvGraph* graph, CvGraphVtx* start_vtx, CvGraphVtx* end_vtx) {
    void *fptr;

    fptr = dlsym(_Chcv_handle, "cvGraphRemoveEdgeByPtr_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return;
    }
    dlrunfun(fptr, NULL, cvGraphRemoveEdgeByPtr, graph, start_vtx, end_vtx);
}
