public RevokeSecurityGroupIngressRequest withFromPort(Integer fromPort) {
        setFromPort(fromPort);
        return this;
    }
<p>
If the protocol is TCP or UDP, this is the start of the port range. If the protocol is ICMP, this is the ICMP
type or -1 (all ICMP types).
</p>

@param fromPort
       If the protocol is TCP or UDP, this is the start of the port range. If the protocol is ICMP, this is the
       ICMP type or -1 (all ICMP types).
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/RevokeSecurityGroupIngressRequest.java