code: @Nullable
    public static IJson readFromReader (@Nonnull final Reader aReader,
                                        @Nullable final IJsonParseExceptionCallback aCustomExceptionCallback)
    {
      ValueEnforcer.notNull (aReader, "Reader");
  
      // No charset determination, as the Reader already has an implicit Charset
      return readJson (StreamHelper.getBuffered (aReader), (IJsonParserCustomizeCallback) null, aCustomExceptionCallback);
    }
docs: Read the Json from the passed {@link Reader}.
  
  @param aReader
  The reader to use. May not be <code>null</code>.
  @param aCustomExceptionCallback
  An optional custom exception handler that can be used to collect the
  unrecoverable parsing errors. May be <code>null</code>.
  @return <code>null</code> if reading failed, the Json declarations
  otherwise.