RemixIconEx.System.close

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

close(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.System.close()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M12 10.586l4.95-4.95 1.414 1.414-4.95 4.95 4.95 4.95-1.414 1.414-4.95-4.95-4.95 4.95-1.414-1.414 4.95-4.95-4.95-4.95L7.05 5.636z" />
</svg>

example usage

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