syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:         /// with that byte value and with the destination `join(Some(_), None)`,
context_before:         /// If `u = a.union(b)`, then for each byte value, `u` will have an edge
context_after:         /// `join(None, Some(_))`, or `join(Some(_), Some(_))` depending on whether `a`,