How to use the injectable.container.injection_container.InjectionContainer function in injectable

def get_namespace_injectables(
    dependency: Injectable, namespace: str
) -> Tuple[Set[Injectable], str, str]:
    if len(InjectionContainer.NAMESPACES) == 0:
        raise InjectionContainerNotLoadedError(
            "InjectionContainer::load was not invoked"
        )
    injection_namespace = InjectionContainer.NAMESPACES[
        namespace or InjectionContainer.DEFAULT_NAMESPACE
    ]
    if isinstance(dependency, str):
        registry = injection_namespace.qualifier_registry
        lookup_key = dependency
        lookup_type = "qualifier"
    else:
        registry = injection_namespace.class_registry
        lookup_key = dependency.__qualname__
        lookup_type = "class"

    injectables = registry.get(lookup_key)
    return injectables, lookup_key, lookup_type