2.1.5.10.29.6 Algorithm for REFS_STREAM_SNAPSHOT_OPERATION_CLEAR_SHADOW_BTREE
Given a DataStream (A), then:
If A is not a shadow DataStream, then the request must be failed with STATUS_INVALID_PARAMETER.
Let B denote the DataStream whose creation time immediately follows that of A, in ascending order.
B is deleted.
A is marked as not being a shadow DataStream.
The operation is completed with STATUS_SUCCESS.<128>