public void setProtocol(String protocol) {
        this.protocol = protocol;
    }
<p>
The protocol used for the port mapping.
</p>

@param protocol
       The protocol used for the port mapping.
@see VirtualGatewayPortProtocol
aws-java-sdk-appmesh/src/main/java/com/amazonaws/services/appmesh/model/VirtualGatewayPortMapping.java