code: public boolean setDefaultTokenEnabled(String name, boolean enabled) {
  		Optional<HttpSessionToken> maybeToken = getDefaultToken(getNormalisedSessionTokenName(name));
  		if (maybeToken.isPresent()) {
  			HttpSessionToken token = maybeToken.get();
  			if (token.isEnabled() == enabled) {
  				return true;
  			}
  			if (token.isEnabled()) {
  				defaultTokensEnabled.remove(token.getName());
  			} else {
  				defaultTokensEnabled.add(token.getName());
  			}
  			token.setEnabled(enabled);
  			saveDefaultTokens();
  			return true;
  		}
  		return false;
  	}
docs: Sets whether or not the default session token with the given name is enabled.
  
  @param name the name of the session token.
  @param enabled {@code true} if should be enabled, {@code false} otherwise.
  @return {@code true} if the token's enabled state changed, {@code false} otherwise.
  @since TODO add version