https://github.com/spring-projects/spring-framework: Spring Transaction (Spring IO)
  • Juergen Hoeller 
Support package for declarative transaction configuration,
with XML schema being the primary configuration format.

/**
 * Support package for declarative transaction configuration,
 * with XML schema being the primary configuration format.
 */
@NonNullApi
@NonNullFields
package org.springframework.transaction.config;

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