impaler/As3-Bloom — comment on commit 0cb53cc9860aabde6d0d120c9ddfddb1b52be92e
File: src/bloom/containers/LayoutContainer.as line 41
By sindney:

Yes, because FlowContainer extends Container, and Container just cares it's own size(to draw it's bg). So changes in it's content doesn't matter container's size.