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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def make_caches(driver, specs, catdir=None, cache_dir=None, storage_options={}):
 """ Creates Cache objects from the cache_specs provided in the catalog yaml file Parameters driver: str Name of the plugin that can load catalog entry specs: list Specification for caching the data source. """

    if specs is None:
        return []
    return [registry.get(spec['type'], FileCache)(
        driver, spec, catdir=catdir, cache_dir=cache_dir,
        storage_options=storage_options)
        for spec in specs]