syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// or is a leaf in the match tree. A candidate with one or more subcandidates is
context_before:     /// A candidate no subcandidates is either incomplete (if it has match pairs left),
context_after:     /// an internal node in the match tree.