syntax_data: {"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // What we really want is an Eulerian cycle for the complete digraph over all possible
context_before:     // By resetting the cursor to `from` each time it changes, we end up checking some edges twice.
context_after:     // `SeekTarget`s, but it's not worth spending the time to compute it.