syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// with 7 chunks, we have 3 entries in the stack. Adding an 8th chunk
context_before:     /// The stack size is MAX_DEPTH + 1 because we do lazy merging. For example,
context_after:     /// requires a 4th entry, rather than merging everything down to 1, because we