code: public static <T> T fromJson(Class<T> type, String value)
  			throws JsonMappingException, JsonParseException, IOException {
  		if (value == null)
  			return null;
  		return _mapper.readValue(value, type);
  	}
docs: Converts JSON string into a value of type specified by Class type.
  
  @param type  the Class type for the data type into which 'value' is to be converted.
  @param value the JSON string to convert.
  @return converted object value or null when value is null.
  @throws JsonMappingException when conversion fails for mapping reason.
  @throws JsonParseException when conversion fails for parse reason.
  @throws IOException when conversion fails for input/output stream reason.