{"ast_node_type":"function","tokens":[{"end":64,"kind":"keyword","start":0,"text":"fn"}]}
                fn from(it: $variant$(<$V>)?) -> $enum$(<$V>)? {
            impl$(<$V>)? From<$variant$(<$V>)?> for $enum$(<$V>)? {
                    $enum::$variant(it)