{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"///"}]}
    /// -> Z` (which desugars to `Fn<(X, Y), Output=Z>`).
    /// Collect `GenericArgs` from the parts of a fn-like path, i.e. `Fn(X, Y)
    pub fn lower_generic_args_from_fn_path(