syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // node along the way. This cache records which nodes trace all the way to
context_before:     // structure from a node towards the root, doing an attribute check on each
context_after:     // the root (most of them do) and saves us from retracing many sub-paths