syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"InlineCtxt($span1:ident)"}]}
source_snippet:         InlineCtxt($span1:ident) => $arm1:expr,
context_before:         $span:expr,
context_after:         InlineParent($span2:ident) => $arm2:expr,