public void setParameters(Map<String, String> parameters) {
            this.parameters = parameters;
        }
Replaces all parameters associated with this connection with the
name/value pairs in the provided map, where the key of each entry
in the map is the corresponding parameter name. Changes to this map
directly affect the parameters associated with this connection.

@param parameters
    The map of all parameter name/value pairs to associate with this
    connection.
extensions/guacamole-auth-json/src/main/java/org/apache/guacamole/auth/json/user/UserData.java