public void setOwnerGid(Long ownerGid) {
        this.ownerGid = ownerGid;
    }
<p>
Specifies the POSIX group ID to apply to the <code>RootDirectory</code>. Accepts values from 0 to 2^32
(4294967295).
</p>

@param ownerGid
       Specifies the POSIX group ID to apply to the <code>RootDirectory</code>. Accepts values from 0 to 2^32
       (4294967295).
aws-java-sdk-efs/src/main/java/com/amazonaws/services/elasticfilesystem/model/CreationInfo.java