syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// if this field is `None` then the `$crate` conversion doesn't happen.
context_before:     /// Span used for retrieving the crate name to which `$crate` refers to,
context_after:     convert_dollar_crate: Option<Span>,