https://github.com/spring-projects/spring-framework: Spring Web (Spring IO)
  • Juergen Hoeller 
Core interfaces and classes for Spring's generic, reactive web support. Builds on top of the org.springframework.http.client.reactive reactive HTTP adapter layer, providing additional constructs such as WebHandler, WebFilter, WebSession among others. 
/**
 * Core interfaces and classes for Spring's generic, reactive web support.
 * Builds on top of the {@code org.springframework.http.client.reactive}
 * reactive HTTP adapter layer, providing additional constructs such as
 * WebHandler, WebFilter, WebSession among others.
 */
@NonNullApi
@NonNullFields
package org.springframework.web.server;

import org.springframework.lang.NonNullApi;
import org.springframework.lang.NonNullFields;