syntax_data: {"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"//!"}]}
source_snippet: //! For coroutines with state 0 (unresumed) it drops the upvars of the coroutine.
context_before: //! The other function is the drop glue for the coroutine.
context_after: //! For coroutines with state 1 (returned) and state 2 (poisoned) it does nothing.