syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"mcount:"}]}
source_snippet:     mcount: Option<StaticCow<str>>,
context_before:     #[serde(rename = "target-mcount")]
context_after:     llvm_mcount_intrinsic: Option<StaticCow<str>>,