syntax_data: {"ast_node_type":"import","tokens":[{"end":84,"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_embeddable_string(span)