public Set<String> getParameterNames() {
        return Collections.unmodifiableSet(parameters.keySet());
    }
Returns a set of all currently defined parameter names. Each name
corresponds to a parameter that has a value set on this
GuacamoleConfiguration via setParameter().

@return A set of all currently defined parameter names.
guacamole-common/src/main/java/org/apache/guacamole/protocol/GuacamoleConfiguration.java