** Use in 'AppModule' classes to denote a service builder method.
@Js
facet class Build {
** If not specified, the service id is taken to be the qualified name of the returned type.
** Example:
**
** syntax: fantom
** @Build
** acme::MyService buildPenguin() { ... }
**
** defines a service with an id of 'acme::MyService'.
const Str? serviceId := null
** A list of scopes this service may be created in.
const Str[]? scopes := null
** A list of service ID aliases.
const Str[]? aliases := null
** A list of service Type aliases.
const Type[]? aliasTypes:= null
}