build# MultiRLModuleSpec.build(module_id: str | None = None) → RLModule[source]# Builds either the MultiRLModule or a (single) sub-RLModule under module_id. Parameters: module_id (str | None) – Optional ModuleID of a single RLModule to be built. If None (default), builds the MultiRLModule. Returns: The built RLModule if module_id is provided, otherwise the built MultiRLModule. Return type: RLModule