RemixIconEx.Logos.facebook_circle

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

facebook_circle(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Logos.facebook_circle()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M13 19.938A8.001 8.001 0 0 0 12 4a8 8 0 0 0-1 15.938V14H9v-2h2v-1.654c0-1.337.14-1.822.4-2.311A2.726 2.726 0 0 1 12.536 6.9c.382-.205.857-.328 1.687-.381.329-.021.755.005 1.278.08v1.9H15c-.917 0-1.296.043-1.522.164a.727.727 0 0 0-.314.314c-.12.226-.164.45-.164 1.368V12h2.5l-.5 2h-2v5.938zM12 22C6.477 22 2 17.523 2 12S6.477 2 12 2s10 4.477 10 10-4.477 10-10 10z" />
</svg>

example usage

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