syntax_data: {"ast_node_type":"impl","tokens":[{"end":100,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // ADTs are `needs_drop` exactly if they `impl Drop` or if any of their "transitive"
context_before:                 // We can use the query system if we consider all drops significant. In that case,
context_after:                 // fields do. There can be no cycles here, because ADTs cannot contain themselves as