code: public String getBody(String language) {
          Body body = getMessageBody(language);
          return body == null ? null : body.message;
      }
docs: Returns the body corresponding to the language. If the language is null, the method result
  will be the same as {@link #getBody()}. Null will be returned if the language does not have
  a corresponding body.
  
  @param language the language of the body to return.
  @return the body related to the passed in language.
  @since 3.0.2