syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"self.infcx.instantiate_binder_with_fresh_vars("}]}
source_snippet:                                     self.infcx.instantiate_binder_with_fresh_vars(
context_before:                                 let source_projection =
context_after:                                         obligation.cause.span,