Function generate 

pub fn generate<F>(router: &Router, options: &Options, filter: F) -> Value
where
    F: Fn(&str) -> bool,

Walk router and emit an OpenAPI 3.1 Value. filter is consulted with the mount path of each controller (no leading or trailing slash); only routes from controllers whose mount passes are included.

See the module docs for the mapping conventions and the limitations on rest parameters / response schemas.