//      already clustered operations.
  LogicalResult Union(unsigned a, unsigned b,
                      const ClusteringPolicySet &policies);

  bool IsMember(Operation *op) const;
  unsigned FindRoot(unsigned id);

  // Verifies that merging `src_root` cluster with a `dst_root` cluster, and
  // inserting it at `insertion_point` location will not break the dominance

		if e != nil {
			return "", e
		}
		if l <= n {
			return UTF16ToString(b[:l]), nil
		}
		n = l
	}
}

// IsMember reports whether the access token t is a member of the provided SID.
func (t Token) IsMember(sid *SID) (bool, error) {
	var b int32
	if e := checkTokenMembership(t, sid, &b); e != nil {
		return false, e
	}
	return b != 0, nil
}

	if r1 == 0 {
		err = errnoErr(e1)
	}
	return
}

func checkTokenMembership(tokenHandle Token, sidToCheck *SID, isMember *int32) (err error) {
	r1, _, e1 := syscall.Syscall(procCheckTokenMembership.Addr(), 3, uintptr(tokenHandle), uintptr(unsafe.Pointer(sidToCheck)), uintptr(unsafe.Pointer(isMember)))
	if r1 == 0 {
		err = errnoErr(e1)
	}
	return
}

func CloseServiceHandle(handle Handle) (err error) {