syntax_data: {"ast_node_type":"struct","tokens":[{"end":79,"kind":"keyword","start":0,"text":"//!"}]}
source_snippet: //! It computes the final layout of the coroutine struct which looks like this:
context_before: //! It converts the coroutine argument from Self to &mut Self adding derefs in the MIR as needed.
context_after: //!     First upvars are stored