syntax_data: {"ast_node_type":"function","tokens":[{"end":42,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn is_used_keyword(self) -> bool {
context_before:     /// Returns `true` if the token is a keyword used in the language.
context_after:         // Note: `span.edition()` is relatively expensive, don't call it unless necessary.