RemixIconEx.Business.registered

You're seeing just the function registered, go back to RemixIconEx.Business module for more information.
Link to this function

registered(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Business.registered()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M12 2c5.523 0 10 4.477 10 10s-4.477 10-10 10S2 17.523 2 12 6.477 2 12 2zm0 2a8 8 0 1 0 0 16 8 8 0 0 0 0-16zm.5 3a3.5 3.5 0 0 1 1.82 6.49L16.868 17h-2.472l-2.18-3H10v3H8V7h4.5zm0 2H10v3h2.5a1.5 1.5 0 0 0 1.493-1.356L14 10.5A1.5 1.5 0 0 0 12.5 9z" />
</svg>

example usage

svg.icon {
  width: 96;
  height: 96;
}