code: public void addAdditionalInformation(String key, String value) {
  		if (this.additionalInformation == null) {
  			this.additionalInformation = new TreeMap<String, String>();
  		}
  
  		this.additionalInformation.put(key, value);
  
  	}
docs: Add some additional information with this OAuth error.
  
  @param key The key.
  @param value The value.