syntax_data: {"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // characters.
context_before:         // Disregard indexes that are at the start or end of their spans, they can't fit bigger
context_after:         if (!forwards && end_index == usize::MIN) || (forwards && start_index == usize::MAX) {