protected Map<String, String> getHttpMethodActions() {
        return this.httpMethodActions;
    }
Returns the HTTP Method name (key) to action verb (value) mapping used to resolve actions based on an
incoming {@code HttpServletRequest}.  All keys and values are lower-case.  The
default key/value pairs are defined in the top class-level JavaDoc.

@return the HTTP Method lower-case name (key) to lower-case action verb (value) mapping
web/src/main/java/org/apache/shiro/web/filter/authz/HttpMethodPermissionFilter.java