// to avoid contention of facesItersectors for writing into the same GridLine
// in case of parallel work of facesItersectors
for ( size_t i = 0; i < facesItersectors.size(); ++i )
// to avoid contention of facesItersectors for writing into the same GridLine
// in case of parallel work of facesItersectors
for ( size_t i = 0; i < facesItersectors.size(); ++i )