syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"LineInfo"}]}
source_snippet:         LineInfo { line_index: 2, start_col: CharPos(0), end_col: CharPos(3) },
context_before:         LineInfo { line_index: 1, start_col: CharPos(4), end_col: CharPos(6) },
context_after:         LineInfo { line_index: 3, start_col: CharPos(0), end_col: CharPos(5) },