public void setSuccessful(java.util.Collection<EnableFastSnapshotRestoreSuccessItem> successful) {
        if (successful == null) {
            this.successful = null;
            return;
        }

        this.successful = new com.amazonaws.internal.SdkInternalList<EnableFastSnapshotRestoreSuccessItem>(successful);
    }
<p>
Information about the snapshots for which fast snapshot restores were successfully enabled.
</p>

@param successful
       Information about the snapshots for which fast snapshot restores were successfully enabled.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/EnableFastSnapshotRestoresResult.java