RemixIconEx.System.forbid

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

forbid(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.System.forbid()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M12 22C6.477 22 2 17.523 2 12S6.477 2 12 2s10 4.477 10 10-4.477 10-10 10zm0-2a8 8 0 1 0 0-16 8 8 0 0 0 0 16zM8.523 7.109l8.368 8.368a6.04 6.04 0 0 1-1.414 1.414L7.109 8.523A6.04 6.04 0 0 1 8.523 7.11z" />
</svg>

example usage

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