# Functions
LeaseGroup ensures that multiple sequencers do not operate on the same tables.
# Structs
A Copier consumes a channel of [types.StagingCursor], assembles the individual temporal batches into large batches, and invokes event callbacks to process the larger batches.
# Type aliases
EachFn is a callback from a [Copier].
FlushFn is a callback from a [Copier].
ProgressFn is a callback from a [Copier].