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elixir-plug · Aug 20, 2023 · 8da6cb1 · 8da6cb1
1 parent efc39c5
commit 8da6cb1
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/lib/mime.ex b/lib/mime.ex
@@ -167,9 +167,15 @@ defmodule MIME do
   @doc """
   Returns a mapping of all known types to their extensions,
   including custom types compiled into the MIME module.
+  
+  ## Examples
+  
+      known_types()
+      #=> %{"application/json" => ["json"], ...}
+
   """
   @doc since: "2.1.0"
-  @spec known_types() :: %{String.t() => [String.t()]}
+  @spec known_types() :: %{required(String.t()) => [String.t()]}
   def known_types do
     unquote(Macro.escape(all_types))
   end