https://github.com/spring-projects/spring-framework: Spring Context (Spring IO)
  • Juergen Hoeller 
Classes supporting the org.springframework.context package,
such as abstract base classes for ApplicationContext
implementations and a MessageSource implementation.

/**
 * Classes supporting the org.springframework.context package,
 * such as abstract base classes for ApplicationContext
 * implementations and a MessageSource implementation.
 */
@NonNullApi
@NonNullFields
package org.springframework.context.support;

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