public NetworkResource withDefinitionTimestamp(java.util.Date definitionTimestamp) {
        setDefinitionTimestamp(definitionTimestamp);
        return this;
    }
<p>
The time that the resource definition was retrieved.
</p>

@param definitionTimestamp
       The time that the resource definition was retrieved.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-networkmanager/src/main/java/com/amazonaws/services/networkmanager/model/NetworkResource.java