syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"from"}]}
source_snippet: from the scope. Each lexical scope thus corresponds to a single-entry,
context_before: via a `break` or `return` or just by fallthrough, that marks an exit
context_after: multiple-exit (SEME) region in the control-flow graph.