syntax_data: {"ast_node_type":"import","tokens":[{"end":88,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                                 // into MIR. Hence we use the remapped path if available
context_before:                                 // This may end up in stderr diagnostics but it may also be emitted
context_after:                                 self.tcx().sess.source_map().span_to_string(span, preference)