syntax_data: {"ast_node_type":"other","tokens":[{"end":111,"kind":"keyword","start":0,"text":"details"}]}
source_snippet:          details about types, etc. (boolean for all passes, 'nll' to enable in NLL MIR only, default: 'nll')"),
context_before:         "include extra comments in mir pretty printing, like line numbers and statement indices, \
context_after:     #[rustc_lint_opt_deny_field_access("use `Session::mir_opt_level` instead of this field")]