syntax_data: {"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// or `let temp = <ty as DerefMut>::deref_mut(&mut place)`.
context_before:     /// Perform `let temp = <ty as Deref>::deref(&place)`.
context_after:     pub(super) fn call_deref(