RemixIconEx.Document.file_gif

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

file_gif(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Document.file_gif()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M16 2l5 5v13.993c0 .556-.445 1.007-.993 1.007H3.993C3.445 22 3 21.545 3 21.008V2.992C3 2.444 3.447 2 3.999 2H16zm-1 2H5v16h14V8h-4V4zm-2 6v5h-1v-5h1zm-2 0v1H9c-.552 0-1 .448-1 1v1c0 .552.448 1 1 1h1v-1H9v-1h2v2c0 .552-.448 1-1 1H9c-1.105 0-2-.895-2-2v-1c0-1.105.895-2 2-2h2zm6 0v1h-2v1h2v1h-2v2h-1v-5h3z" />
</svg>

example usage

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