syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // However, in practice these bitsets are not usually large. The layout code
context_before:     // this is twice as many bits as we need, since the relation is symmetric.
context_after:     // also needs to keep track of how many conflicts each local has, so it's