RemixIconEx.Document.file_music

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

file_music(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Document.file_music()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M16 8v2h-3v4.5a2.5 2.5 0 1 1-2-2.45V8h4V4H5v16h14V8h-3zM3 2.992C3 2.444 3.447 2 3.999 2H16l5 5v13.993A1 1 0 0 1 20.007 22H3.993A1 1 0 0 1 3 21.008V2.992z" />
</svg>

example usage

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