syntax_data: {"ast_node_type":"function","tokens":[{"end":90,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) fn union(self, other: Self, mut new_state: impl FnMut() -> State) -> Self {
context_before:     /// Compute the union of two `Dfa`s.
context_after:         // We implement `union` by lazily initializing a set of states