syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // vars. See comment on `shift_vars_through_binders` method in
context_before: // a binding level that is not intended to capture the existing bound
context_after: // `rustc_middle/src/ty/generic_args.rs` for more details.