public abstract static class AbsorptionFeed.PendingItem
A pending item represents a tree under construction.
The sequence number represents its position relative to other trees under construction.
The builder is the builder being used to construct the tree.
Get a receiver which will be notified of all events in the streamed input between the start event
for this node and the corresponding end event. This Receiver gathers data into the pending item
so that the final result of processing the streamed node can be computed by the deliver() method
a receiver to be notified of all events relating to this streamed input node