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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 _load_custom_config(run_config):
 """Load custom configuration input HOCON file for cromwell. """

    from pyhocon import ConfigFactory, HOCONConverter, ConfigTree
    conf = ConfigFactory.parse_file(run_config)
    out = {}
    if "database" in conf:
        out["database"] = HOCONConverter.to_hocon(ConfigTree({"database": conf.get_config("database")}))
    return out