public virtual void SetCMYKColorStroke(int cyan, int magenta, int yellow, int black)
{
content.Append((float)(cyan & 0xFF) / 0xFF);
content.Append(' ');
content.Append((float)(magenta & 0xFF) / 0xFF);
content.Append(' ');
content.Append((float)(yellow & 0xFF) / 0xFF);
content.Append(' ');
content.Append((float)(black & 0xFF) / 0xFF);
content.Append(" K").Append_i(separator);
}