syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":".unwrap_or_else(PatKind::Error)"}]}
source_snippet:                     .unwrap_or_else(PatKind::Error)
context_before:                 self.lower_pattern_range(lo_expr, hi_expr, end, ty, span)
context_after:             }