vertx-gaia/vertx-co/src/main/environment/io/vertx/up/annotations/Contract.java
package io.vertx.up.annotations;
import java.lang.annotation.*;
@Target({ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
public @interface Contract {
/*
* This annotation is used between different business component
*/
}