syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// `on_stack` cannot be true for unsized arguments, i.e., when `meta_attrs` is `Some`.
context_before:     ///
context_after:     Indirect { attrs: ArgAttributes, meta_attrs: Option<ArgAttributes>, on_stack: bool },