The causal mask of an N-position window over a maxSize ring holding
offset positions, before the window's append: the fused kernel's causal
mask while the window fits, the materialized sliding-window mask once it
binds (makeMask(N, maxSize) of the plain and the affine ring). Leased from
masks under one family, so plain and affine rings of one model share it.
The causal mask of an
N-position window over amaxSizering holdingoffsetpositions, before the window's append: the fused kernel's causal mask while the window fits, the materialized sliding-window mask once it binds (makeMask(N, maxSize)of the plain and the affine ring). Leased frommasksunder one family, so plain and affine rings of one model share it.