syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"via"}]}
source_snippet: via a `break` or `return` or just by fallthrough, that marks an exit
context_before: stuff in the control-flow graph. Whenever the scope is exited, either
context_after: from the scope. Each lexical scope thus corresponds to a single-entry,