syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"inline_mir_preserve_debug:"}]}
source_snippet:     inline_mir_preserve_debug: Option<bool> = (None, parse_opt_bool, [TRACKED],
context_before:         "inlining threshold for functions with inline hint (default: 100)"),
context_after:         "when MIR inlining, whether to preserve debug info for callee variables \