public AddTagsToCertificateRequest withTags(java.util.Collection<Tag> tags) {
        setTags(tags);
        return this;
    }
<p>
The key-value pair that defines the tag. The tag value is optional.
</p>

@param tags
       The key-value pair that defines the tag. The tag value is optional.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-acm/src/main/java/com/amazonaws/services/certificatemanager/model/AddTagsToCertificateRequest.java