syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // see `rustc_hir_analysis::check::closure`.
context_before:     // type is known at the time of the creation of `ClosureArgs`,
context_after:     pub fn sig_as_fn_ptr_ty(self) -> I::Ty {