   end
 
   @doc """
-  Deletes a value from the set.
+  Deletes `value` from `set`.
 
   ## Examples
 

  end

  @doc """
  Checks if set1's members are all contained in set2.

  ## Examples


  end

  @doc """
  Returns a set containing all members of `set1` and `set2`.

  ## Examples

