build
a:1,b:2,c:3,d:4
----

iter
first
next
next
next
next
----
<a:1><b:2><c:3><d:4>.

iter
seek-ge a
next
next
next
next
----
<a:1><b:2><c:3><d:4>.

iter
seek-ge b
next
next
next
----
<b:2><c:3><d:4>.

iter
seek-ge c
next
next
----
<c:3><d:4>.

iter
seek-ge d
next
----
<d:4>.

iter
seek-ge e
----
.

iter
seek-ge b
seek-ge c
seek-ge d
seek-ge e
----
<b:2><c:3><d:4>.

iter
last
prev
prev
prev
prev
----
<d:4><c:3><b:2><a:1>.

iter
seek-lt e
prev
prev
prev
prev
----
<d:4><c:3><b:2><a:1>.

iter
seek-lt d
prev
prev
prev
----
<c:3><b:2><a:1>.

iter
seek-lt c
prev
prev
----
<b:2><a:1>.

iter
seek-lt b
prev
----
<a:1>.

iter
seek-lt a
prev
next
----
..<a:1>

iter
seek-ge d
next
next
prev
----
<d:4>..<d:4>

iter
seek-lt d
seek-lt c
seek-lt b
seek-lt a
----
<c:3><b:2><a:1>.

iter globalSeqNum=1
first
next
next
next
next
----
<a:1><b:1><c:1><d:1>.

iter globalSeqNum=10
first
next
next
next
next
----
<a:10><b:10><c:10><d:10>.
