IntPackedSectorMap entry type, with custom read function.regionFactory and maxCacheSizeK such that key.getRegionKey().equals(regionKey) && key.getId() == id, or throws
IllegalArgumentException when the region key and id pair doesn't represent any key of this type.IKeyProvider.getKeyCount(RegionKey).IHeaderDataEntry objects by IKey, and provides the necessary metadata (currently entry size)RegionKey),
and logical location inside the region (ID).ByteBuffer with bytes read from the given ByteChannel.regionFactory and maxCacheSizeByteBuffer.ByteBuffer to the given ByteChannel.ByteBuffers to the given ByteChannel.