syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // Rewrite a.b(c) into UFCS form like Trait::b(a, c)
context_before:             hir::ExprKind::MethodCall(segment, receiver, args, fn_span) => {
context_after:                 let expr = self.method_callee(expr, segment.ident.span, None);