public SecurityGroupRuleDescription withFromPort(Long fromPort) {
        setFromPort(fromPort);
        return this;
    }
<p>
The start of the port range for the TCP and UDP protocols, or an ICMP/ICMPv6 type number. A value of
<code>-1</code> indicates all ICMP/ICMPv6 types.
</p>

@param fromPort
       The start of the port range for the TCP and UDP protocols, or an ICMP/ICMPv6 type number. A value of
       <code>-1</code> indicates all ICMP/ICMPv6 types.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-fms/src/main/java/com/amazonaws/services/fms/model/SecurityGroupRuleDescription.java