syntax_data: {"ast_node_type":"other","tokens":[{"end":14,"kind":"keyword","start":0,"text":"Self"}]}
source_snippet:         Self {
context_before:     pub fn offset_pair(a: Reg, offset_from_start: Size, b: Reg) -> Self {
context_after:             prefix: [Some(a), None, None, None, None, None, None, None],