syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"(default:"}]}
source_snippet:         (default: preserve for debuginfo != None, otherwise remove)"),
context_before:         "when MIR inlining, whether to preserve debug info for callee variables \
context_after:     inline_mir_threshold: Option<usize> = (None, parse_opt_number, [TRACKED],