flax

d37d8349 - Replace deprecated `jax.tree_*` functions with `jax.tree.*`

Replace deprecated `jax.tree_*` functions with `jax.tree.*` The top-level `jax.tree_*` aliases have long been deprecated, and will soon be removed. Alternate APIs are in `jax.tree_util`, with shorter aliases in the `jax.tree` submodule, added in JAX version 0.4.25. PiperOrigin-RevId: 634095385