public Layer withCreatedAt(String createdAt) {
        setCreatedAt(createdAt);
        return this;
    }
<p>
Date when the layer was created.
</p>

@param createdAt
       Date when the layer was created.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-opsworks/src/main/java/com/amazonaws/services/opsworks/model/Layer.java