buffer.append(", ");
            }
        }
        connection.setRequestProperty(key, buffer.toString());
    }

    public String getRequestProperty(String key) {
        return connection.getRequestProperty(key);
    }

    public Map getRequestProperties() {
        Map map = new HashMap();
        Iterator entries = requestProperties.entrySet().iterator();

            }
        }
        this.connection.setRequestProperty(key, buffer.toString());
    }


    @Override
    public String getRequestProperty ( String key ) {
        return this.connection.getRequestProperty(key);
    }


    @Override
    public Map<String, List<String>> getRequestProperties () {
        Map<String, List<String>> map = new HashMap<>();