RemixIconEx.System.arrow_drop_up

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

arrow_drop_up(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.System.arrow_drop_up()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M12 11.828l-2.828 2.829-1.415-1.414L12 9l4.243 4.243-1.415 1.414L12 11.828z" />
</svg>

example usage

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