syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"syntax_context_data:"}]}
source_snippet:             syntax_context_data: vec![root_ctxt_data],
context_before:                 .collect(),
context_after:             syntax_context_map: iter::once((root_ctxt_data.key(), SyntaxContext(0))).collect(),