syntax_data: {"ast_node_type":"function","tokens":[{"end":63,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn from_str(version: &str) -> Result<Self, ParseIntError> {
context_before:     /// Parse an OS version triple (SDK version or deployment target).
context_after:         if let Some((major, minor)) = version.split_once('.') {