RemixIconEx.System.arrow_left_right

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

arrow_left_right(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.System.arrow_left_right()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M16.05 12.05L21 17l-4.95 4.95-1.414-1.414 2.536-2.537L4 18v-2h13.172l-2.536-2.536 1.414-1.414zm-8.1-10l1.414 1.414L6.828 6 20 6v2H6.828l2.536 2.536L7.95 11.95 3 7l4.95-4.95z" />
</svg>

example usage

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