RemixIconEx.System.share_box

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

share_box(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.System.share_box()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M10 3v2H5v14h14v-5h2v6a1 1 0 0 1-1 1H4a1 1 0 0 1-1-1V4a1 1 0 0 1 1-1h6zm7.586 2H13V3h8v8h-2V6.414l-7 7L10.586 12l7-7z" />
</svg>

example usage

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