syntax_data: {"ast_node_type":"import","tokens":[{"end":66,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // and to the end of the line. Be careful because the line
context_before:         // For every line but the last, it extends from `start_col`
context_after:         // numbers in Loc are 1-based, so we subtract 1 to get 0-based