public Integer getFromPort() {
        return this.fromPort;
    }
<p>
If the protocol is TCP or UDP, this is the start of the port range. If the protocol is ICMP or ICMPv6, this is
the ICMP type or -1 (all ICMP types).
</p>

@return If the protocol is TCP or UDP, this is the start of the port range. If the protocol is ICMP or ICMPv6,
        this is the ICMP type or -1 (all ICMP types).
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/SecurityGroupRule.java