syntax_data: {"ast_node_type":"function","tokens":[{"end":74,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) fn seq<const N: usize>(trees: [Tree<D, R, T>; N]) -> Self {
context_before:     /// after another.
context_after:         trees.into_iter().fold(Tree::unit(), Self::then)