public static Collection<String> getAvailableAuthenticationHandleNames(final RequestContext context) {
        return context.getFlowScope().get("availableAuthenticationHandlerNames", Collection.class);
    }
Gets available authentication handle names.

@param context the context
@return the available authentication handle names
core/cas-server-core-web-api/src/main/java/org/apereo/cas/web/support/WebUtils.java