{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"ops::{Fn,"}]}
            ops::{Fn, FnMut, FnOnce},                // :fn
            ops::{AsyncFn, AsyncFnMut, AsyncFnOnce}, // :async_fn
            option::Option::{self, None, Some},      // :option