syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"merge_functions:"}]}
source_snippet:     merge_functions: Option<MergeFunctions>,
context_before:     override_export_symbols: Option<StaticCow<[StaticCow<str>]>>,
context_after:     #[serde(rename = "target-mcount")]