https://github.com/spring-projects/spring-framework: Spring Transaction (Spring IO)
  • Juergen Hoeller 
Spring's support for annotation-based transaction demarcation.
Hooked into Spring's transaction interception infrastructure
via a special TransactionAttributeSource implementation.

/**
 * Spring's support for annotation-based transaction demarcation.
 * Hooked into Spring's transaction interception infrastructure
 * via a special TransactionAttributeSource implementation.
 */
@NonNullApi
@NonNullFields
package org.springframework.transaction.annotation;

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