public Contact withChannel(Channel channel) {
        this.channel = channel.toString();
        return this;
    }
<p>
How the contact reached your contact center.
</p>

@param channel
       How the contact reached your contact center.
@return Returns a reference to this object so that method calls can be chained together.
@see Channel
aws-java-sdk-connect/src/main/java/com/amazonaws/services/connect/model/Contact.java