public void setServletRequest(ServletRequest request) {
        if (request != null) {
            put(SERVLET_REQUEST, request);
        }
    }
Default {@code WebSubjectContext} implementation that provides for additional storage and retrieval of
a {@link ServletRequest} and {@link ServletResponse}.

@since 1.0
web/src/main/java/org/apache/shiro/web/subject/support/DefaultWebSubjectContext.java