public IStyle GetStyle([NotNull] TileBase tile)
{
if (tile == null)
{
throw new ArgumentNullException(nameof(tile));
}
HashSet <TileStyle> styles;
if (!StylesByShape.TryGetValue(tile.Shape, out styles))
{
return(null);
}
Debug.Assert(styles != null, "styles != null");
IStyle style = GetStyle(tile, styles.Select(s => s.Style).ToArray(), ref tile.StyleState);
return(style?.Transform(tile.Transform));
}