private static State <FilterChainState, XElement> BuildColorMatrix(ColorMatrix matrix)
{
var element =
XElementBuilder
.WithName("feColorMatrix")
.Add(
new XAttribute("type", "matrix"),
new XAttribute(
"values",
matrix.GetMatrixValues().Select(x => x.ToString()).Pipe(x => string.Join(" ", x))));
return(element.Pipe(BuildIOFilter).Select(x => x.Build()));
}