public void renderGridToFile(IndigoObject items, int[] refatoms, int ncolumns, string filename)
{
if (refatoms != null)
{
if (refatoms.Length != items.count())
{
throw new IndigoException("renderGridToFile(): refatoms[] size must be equal to the number of objects");
}
}
_indigo.checkResult(_renderer_lib.indigoRenderGridToFile(items.self, refatoms, ncolumns, filename));
}