public CreateVolumePermission withGroup(String group) {
        setGroup(group);
        return this;
    }
<p>
The group to be added or removed. The possible value is <code>all</code>.
</p>

@param group
       The group to be added or removed. The possible value is <code>all</code>.
@return Returns a reference to this object so that method calls can be chained together.
@see PermissionGroup
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/CreateVolumePermission.java