syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"\"how"}]}
source_snippet:         "how to run proc-macro code (default: same-thread)"),
context_before:         parse_proc_macro_execution_strategy, [UNTRACKED],
context_after:     profile_closures: bool = (false, parse_no_value, [UNTRACKED],