https://github.com/spring-projects/spring-framework: Spring Context (Spring IO)
  • Juergen Hoeller 
Support package for load time weaving based on class loaders,
as required by JPA providers (but not JPA-specific).

/**
 * Support package for load time weaving based on class loaders,
 * as required by JPA providers (but not JPA-specific).
 */
@NonNullApi
@NonNullFields
package org.springframework.instrument.classloading;

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