public static void putAvailableAuthenticationHandleNames(final RequestContext context, final Collection<String> availableHandlers) {
        context.getFlowScope().put("availableAuthenticationHandlerNames", availableHandlers);
    }
Put available authentication handle names.

@param context           the context
@param availableHandlers the available handlers
core/cas-server-core-web-api/src/main/java/org/apereo/cas/web/support/WebUtils.java