code: @Nullable
    public static <ENUMTYPE extends Enum <ENUMTYPE> & IHasID <String>> ENUMTYPE getFromIDCaseInsensitiveOrNull (@Nonnull final Class <ENUMTYPE> aClass,
                                                                                                                @Nullable final String sID)
    {
      return getFromIDCaseInsensitiveOrDefault (aClass, sID, null);
    }
docs: Get the enum value with the passed string ID case insensitive
  
  @param <ENUMTYPE>
  The enum type
  @param aClass
  The enum class
  @param sID
  The ID to search
  @return <code>null</code> if no enum item with the given ID is present.