syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":".non_1zst_field(cx)"}]}
source_snippet:                 .non_1zst_field(cx)
context_before:             wide_pointer_layout = wide_pointer_layout
context_after:                 .expect("not exactly one non-1-ZST field in a `DispatchFromDyn` type")