getByUrl(urlToLookup) {
        return Object.values(this.urls).filter(url => url.url === urlToLookup);
    }
@description Get by url.

@NOTE:
It's is in theory possible that:

 - resource1 -> /welcome/
 - resource2 -> /welcome/

 But depending on the routing registration, you will always serve e.g. resource1,
 because the router it belongs to was registered first.

 @param {string} urlToLookup
 @returns {Url[]}