code: private Map<String, Object> extractErrorDetailsFromResponse(ClientHttpResponse response) throws IOException {
  		ObjectMapper mapper = new ObjectMapper(new JsonFactory());
  		try {
  			return mapper.<Map<String, Object>> readValue(response.getBody(), new TypeReference<Map<String, Object>>() {
  			});
  		} catch (JsonParseException e) {
  			return null;
  		}
  	}
docs: Error details are returned in the message body as JSON. Extract these in
  a map
  
  @param response
  from yammer
  @return json body as a map
  @throws IOException
  if ItemStream is closed