syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// `false` means nothing -- could be `AsyncDrop`, might not be.
context_before:     /// Returning true means the type is known to be `!AsyncDrop`. Returning
context_after:     fn is_trivially_not_async_drop(self) -> bool {