code: @Nullable
    public static String getDirectoryFromPackage (@Nullable final Package aPackage)
    {
      // No differentiation
      return aPackage == null ? null : getPathFromClass (aPackage.getName ());
    }
docs: Convert a package name to a relative directory name.
  
  @param aPackage
  The package to be converted. May be <code>null</code>.
  @return The directory name using forward slashes (/) instead of the dots.