RemixIconEx.System.loader_5

You're seeing just the function loader_5, go back to RemixIconEx.System module for more information.
Link to this function

loader_5(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.System.loader_5()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M12 3a9 9 0 0 1 9 9h-2a7 7 0 0 0-7-7V3z" />
</svg>

example usage

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