public ExternalSourceConfiguration withSource(ExternalSource source) {
        this.source = source.toString();
        return this;
    }
<p>
The type of the external data source.
</p>

@param source
       The type of the external data source.
@return Returns a reference to this object so that method calls can be chained together.
@see ExternalSource
aws-java-sdk-qconnect/src/main/java/com/amazonaws/services/qconnect/model/ExternalSourceConfiguration.java